Replace CMAKE_SOURCE_DIR with PROJECT_SOURCE_DIR

Bug: 1596
Change-Id: I62285bb912e79323b7bb3fcdaea9ff64b1a4a1b9
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/110172
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>

src/dawn/node/CMakeLists.txt

@@ -72,7 +72,7 @@ set_target_properties(dawn_node PROPERTIES
 )
 target_link_libraries(dawn_node dawn_node_binding dawn_node_interop dawn_native dawncpp dawn_proc)
 target_include_directories(dawn_node PRIVATE
-    "${CMAKE_SOURCE_DIR}"
+    "${PROJECT_SOURCE_DIR}"
     "${DAWN_THIRD_PARTY_DIR}"
     "${NODE_API_HEADERS_DIR}/include"
     "${DAWN_NODE_GEN_DIR}"

src/dawn/node/binding/CMakeLists.txt

@@ -70,7 +70,7 @@ common_compile_options(dawn_node_binding)
 
 target_include_directories(dawn_node_binding
     PRIVATE
-        "${CMAKE_SOURCE_DIR}"
+        "${PROJECT_SOURCE_DIR}"
         "${DAWN_THIRD_PARTY_DIR}"
         "${NODE_API_HEADERS_DIR}/include"
         "${DAWN_NODE_GEN_DIR}"

src/dawn/node/interop/CMakeLists.txt

@@ -51,7 +51,7 @@ common_compile_options(dawn_node_interop)
 
 target_include_directories(dawn_node_interop
     PRIVATE
-        "${CMAKE_SOURCE_DIR}"
+        "${PROJECT_SOURCE_DIR}"
         "${DAWN_THIRD_PARTY_DIR}"
         "${NODE_API_HEADERS_DIR}/include"
         "${DAWN_NODE_GEN_DIR}"