Update shell.nix

Author: hamphet

shell.nix

@@ -24,8 +24,10 @@ in stdenv.mkDerivation {
       "-DCMAKE_EXPORT_COMPILE_COMMANDS=ON"
       "-DCMAKE_INSTALL_PREFIX=../inst"
       "-DLLVM_TARGETS_TO_BUILD=host"
+      "-DLLVM_ENABLE_FFI=ON"
+      "-DLLVM_ENABLE_DUMP=ON"
       "-DLLVM_ENABLE_PER_TARGET_RUNTIME_DIR=OFF"
-      "-DLLVM_ENABLE_PROJECTS=\"clang;clang-tools-extra;lld\""
+      "-DLLVM_ENABLE_PROJECTS=\"clang;clang-tools-extra;lld;libc;libclc;lldb\""
       "-DLLVM_ENABLE_RUNTIMES=\"compiler-rt;libcxx;libcxxabi;libunwind\""
       "-DLLVM_INSTALL_UTILS=ON"
       "-DCMAKE_POSITION_INDEPENDENT_CODE=ON"