8247396: Exclude PCH for files in $(OPT_SPEED_SRC) with clang after JDK-8246751

Reviewed-by: ihse, erikj

make/hotspot/lib/JvmOverrideFiles.gmk

@@ -62,6 +62,7 @@ ifeq ($(call isTargetOs, linux), true)
     JVM_PRECOMPILED_HEADER_EXCLUDE := \
 	sharedRuntimeTrig.cpp \
 	sharedRuntimeTrans.cpp \
+        $(OPT_SPEED_SRC) \
 	#
   endif
 
@@ -111,6 +112,7 @@ else ifeq ($(call isTargetOs, macosx), true)
         loopTransform.cpp \
         unsafe.cpp \
         jvmciCompilerToVM.cpp \
+        $(OPT_SPEED_SRC) \
         #
   endif