[NFC][AMDGPU] Fix cmake when LLVM is a subproject

CMAKE_SOURCE_DIR is not the right directory if llvm is included in
another cmake project. PROJECT_SOURCE_DIR is always the same and should
be used instead.

diff --git a/llvm/unittests/Target/AMDGPU/CMakeLists.txt b/llvm/unittests/Target/AMDGPU/CMakeLists.txt
index ba6b92f..7b4548a 100644 (file)
--- a/llvm/unittests/Target/AMDGPU/CMakeLists.txt
+++ b/llvm/unittests/Target/AMDGPU/CMakeLists.txt
@@ -1,6 +1,6 @@
 include_directories(
-  ${CMAKE_SOURCE_DIR}/lib/Target/AMDGPU
-  ${CMAKE_BINARY_DIR}/lib/Target/AMDGPU
+  ${PROJECT_SOURCE_DIR}/lib/Target/AMDGPU
+  ${PROJECT_BINARY_DIR}/lib/Target/AMDGPU
   )
 
 set(LLVM_LINK_COMPONENTS