Adding another abs paths for finding other IGC components.

Change-Id: I47fd122cea0cf82bdb836fb1ca2b3a24335586a0

Author: lwesiers

CMakeLists.txt

@@ -126,11 +126,15 @@ endif()
 if(NOT EXISTS ${LLVM_SOURCE_URL})
     # Use LLVM sources stored at fixed location
     set(LLVM_SOURCE_URL ${CMAKE_CURRENT_SOURCE_DIR}/../llvm_source)
-    if(NOT EXISTS ${LLVM_SOURCE_URL})
-        # Use tar archive with stock LLVM sources.
-        set(LLVM_SOURCE_USE_TARBALL true)
-        set(LLVM_SOURCE_URL "${BS_DIR_MIGRATION_BINARIES}/igc/llvm/llvm-4.0.0.src.tar.xz")
-    endif()
+endif()
+if(NOT EXISTS ${LLVM_SOURCE_URL})
+    # Use LLVM sources stored at fixed location
+    set(LLVM_SOURCE_URL ${CMAKE_CURRENT_SOURCE_DIR}/../../../../llvm_source)
+endif()
+if(NOT EXISTS ${LLVM_SOURCE_URL})
+    # Use tar archive with stock LLVM sources.
+    set(LLVM_SOURCE_USE_TARBALL true)
+    set(LLVM_SOURCE_URL "${BS_DIR_MIGRATION_BINARIES}/igc/llvm/llvm-4.0.0.src.tar.xz")
 endif()
 
 # Use LLVM stock sources or patched stock sources