Adding llvm/clang to our CMakeLists files

The indexer target now depends on libclang. This 
will force cmake to build the required parts of 
llvm and clang.

cpp/CMakeLists.txt

@@ -34,5 +34,6 @@ if( NOT CMAKE_BUILD_TYPE )
   set( CMAKE_BUILD_TYPE RELEASE )
 endif()
 
+add_subdirectory( llvm )
 add_subdirectory( BoostParts )
 add_subdirectory( ycm )

cpp/ycm/CMakeLists.txt

@@ -33,6 +33,8 @@ include_directories(
   SYSTEM
   ${BoostParts_SOURCE_DIR}
   ${PYTHON_INCLUDE_DIRS}
+  "${LLVM_SOURCE_DIR}/include"
+  "${LLVM_SOURCE_DIR}/tools/clang/include"
   )
 
 file( GLOB_RECURSE SOURCES *.h *.cpp )
@@ -55,6 +57,7 @@ add_library( ${PROJECT_NAME} SHARED
 target_link_libraries( ${PROJECT_NAME}
                        BoostParts
                        ${PYTHON_LIBRARIES}
+                       libclang_static
                      )
 
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