SourceKit: fix silly copy paste error in CMake

Correct the variable setting to setup the compiler as desired.

Author: compnerd

tools/SourceKit/CMakeLists.txt

@@ -13,15 +13,16 @@ if(NOT CMAKE_C_COMPILER_ID MATCHES Clang)
     get_target_property(CLANG_LOCATION clang LOCATION)
     get_filename_component(CLANG_LOCATION ${CLANG_LOCATION} DIRECTORY)
 
-    if(CMAKE_C_COMPILER_ID STREQUAL MSVC OR CMAKE_C_SIMULATE_ID STREQUAL MSVC)
-      set(CMAKE_C_COMPILER_ID
+    if("${CMAKE_C_COMPILER_ID}" STREQUAL "MSVC" OR
+        "${CMAKE_C_SIMULATE_ID}" STREQUAL "MSVC")
+      set(CMAKE_C_COMPILER
         ${CLANG_LOCATION}/clang-cl${CMAKE_EXECUTABLE_SUFFIX})
-      set(CMAKE_CXX_COMPILER_ID
+      set(CMAKE_CXX_COMPILER
         ${CLANG_LOCATION}/clang-cl${CMAKE_EXECUTABLE_SUFFIX})
     else()
-      set(CMAKE_C_COMPILER_ID
+      set(CMAKE_C_COMPILER
         ${CLANG_LOCATION}/clang${CMAKE_EXECUTABLE_SUFFIX})
-      set(CMAKE_CXX_COMPILER_ID
+      set(CMAKE_CXX_COMPILER
         ${CLANG_LOCATION}/clang++${CMAKE_EXECUTABLE_SUFFIX})
     endif()
   else()