[NFC] Cleanup README

- Wrapped long lines
- Replaced 'common clang' -> 'opencl-clang'
- Added `bash` to code blocks to enable code highlighting
- Updated travis ci badge to point to the correct branch
- Updated build instructions to mention correct branches

Signed-off-by: Alexey Sachkov <[email protected]>

Author: AlexeySachkov

README.md

@@ -1,6 +1,6 @@
-[![Build Status](https://travis-ci.com/intel/opencl-clang.svg?branch=master)](https://travis-ci.com/intel/opencl-clang)
+[![Build Status](https://travis-ci.com/intel/opencl-clang.svg?branch=ocl-open-100)](https://travis-ci.com/intel/opencl-clang)
 
-Common clang is a thin wrapper library around clang. Common clang has
+opencl-clang is a thin wrapper library around clang. The library has
 OpenCL-oriented API and is capable to compile OpenCL C kernels to SPIR-V
 modules.
 
@@ -25,9 +25,9 @@ Before the build all dependencies must be downloaded and laid out as follows:
 This can be done using the following commands:
 ```bash
 cd <workspace>
-git clone https://github.com/llvm/llvm-project.git .
-git clone https://github.com/KhronosGroup/SPIRV-LLVM-Translator.git
-git clone https://github.com/intel/opencl-clang.git
+git clone https://github.com/llvm/llvm-project.git . -b release/10.x
+git clone https://github.com/KhronosGroup/SPIRV-LLVM-Translator.git -b llvm_release_100
+git clone https://github.com/intel/opencl-clang.git -b ocl-open-100
 ```
 
 Then we need to create a build directory and run the build:
@@ -48,17 +48,17 @@ For sanity check of the build please run `make check-clang` and
 
 ### Out-of-tree build
 
-To build Common clang as a standalone project, you need to obtain pre-built LLVM
+To build opencl-clang as a standalone project, you need to obtain pre-built LLVM
 and SPIR-V Translator libraries. **Note:** currently this kind of build is
 supported on Linux only.
 
 Integration with pre-built LLVM is done using standard `find_package` way as
 documented in [Embedding LLVM in your project](https://llvm.org/docs/CMake.html#embedding-llvm-in-your-project).
 
 Commands to checkout sources and build:
-```
+```bash
 cd <workspace>
-git clone https://github.com/intel/opencl-clang.git
+git clone https://github.com/intel/opencl-clang.git -b ocl-open-100
 mkdir build && cd build
 cmake ../opencl-clang
 make all -j`nproc`
@@ -68,36 +68,37 @@ make all -j`nproc`
 
 ##### Preferred LLVM version
 
-By default, Common clang's cmake script is searching for LLVM 10.0.0. You can
-override target version of LLVM by using the `PREFERRED_LLVM_VERSION` cmake option:
+By default, openclc-clang's cmake script is searching for LLVM 10.0.0. You can
+override target version of LLVM by using the `PREFERRED_LLVM_VERSION` cmake
+option:
 
 Example:
-```
+```bash
 cmake -DPREFERRED_LLVM_VERSION="10.0.0" ../opencl-clang
 ```
 
 ##### Custom LLVM installation
 
 If LLVM is installed somewhere in custom (non-system directories) location, you
-could point to it using the `LLVM_DIR` cmake option. **Note**: You need to specify
-the path to a directory containing the `LLVMConfig.cmake` file.
+could point to it using the `LLVM_DIR` cmake option. **Note**: You need to
+specify the path to a directory containing the `LLVMConfig.cmake` file.
 
 This file is available in two different locations.
 * `<INSTALL_PREFIX>/lib/cmake/llvm/LLVMConfig.cmake` where `<INSTALL_PREFIX>`
-  is the install prefix of an installed version of LLVM. On Linux this is typically
-  `/usr/lib/cmake/llvm/LLVMConfig.cmake`.
+  is the install prefix of an installed version of LLVM. On Linux this is
+  typically `/usr/lib/cmake/llvm/LLVMConfig.cmake`.
 * `<LLVM_BUILD_ROOT>/lib/cmake/llvm/LLVMConfig.cmake` where `<LLVM_BUILD_ROOT>`
   is the root of the LLVM build tree.
   **Note: this is only available when building LLVM with CMake.**
 
 Example:
-```
+```bash
 cmake -DLLVM_DIR=/path/to/installed/llvm/lib/cmake/llvm ../opencl-clang
 ```
 
 ##### Location of SPIR-V Translator library
 
-By default, Common clang's cmake script assumes that SPIR-V Translator library
+By default, opencl-clang's cmake script assumes that SPIR-V Translator library
 is built as part of LLVM, installed in the same place and libLLVMSPIRVLib is
 linked into libLLVM.
 
@@ -107,11 +108,12 @@ directory where SPIR-V Translator is installed by using `SPIRV_TRANSLATOR_DIR`
 cmake option.
 
 Example:
-```
+```bash
 cmake -DLLVMSPIRV_INCLUDED_IN_LLVM=OFF -DSPIRV_TRANSLATOR_DIR=/path/to/installed/spirv/translator ../opencl-clang
 ```
 
-There is a known issue (linker crash) for this kind of build on Ubuntu 16.04 Xenial.
+There is a known issue (linker crash) for this kind of build on Ubuntu 16.04
+Xenial.
 In this case the following cmake option should fix it:
 ```
 -DLLVM_NO_DEAD_STRIP=ON