Merge pull request #1518 from Kangz/fix_dawn

BUILD.gn: glslang_sources need the public config too

BUILD.gn

@@ -40,6 +40,8 @@ config("glslang_public") {
 }
 
 source_set("glslang_sources") {
+  public_configs = [ ":glslang_public" ]
+
   sources = [
     "OGLCompilersDLL/InitializeDll.cpp",
     "OGLCompilersDLL/InitializeDll.h",
@@ -152,8 +154,6 @@ source_set("glslang_sources") {
 }
 
 static_library("glslang_static") {
-  public_configs = [ ":glslang_public" ]
-
   deps = [
     ":glslang_sources",
   ]