8019692: JDK build CC_OPT_HIGHEST setting isn't valid for Sun C++ compiler

Reviewed-by: jgodinez

make/sun/font/Makefile

@@ -36,7 +36,11 @@ PRODUCT = sun
 CPLUSPLUSLIBRARY=true
 
 # Use higher optimization level
+ifeq ($(PLATFORM), windows)
 OPTIMIZATION_LEVEL = HIGHEST
+else
+OPTIMIZATION_LEVEL = HIGHER
+endif
 
 include $(BUILDDIR)/common/Defs.gmk
 

makefiles/CompileNativeLibraries.gmk

@@ -1327,11 +1327,12 @@ else
     BUILD_LIBFONTMANAGER_FONTLIB:=$(FREETYPE2_LIBS)
 endif
 
-LIBFONTMANAGER_OPTIMIZATION:=HIGHEST
+LIBFONTMANAGER_OPTIMIZATION:=HIGH
 
 ifeq ($(OPENJDK_TARGET_OS),windows)
     LIBFONTMANAGER_EXCLUDE_FILES += X11FontScaler.c \
 				    X11TextRenderer.c
+LIBFONTMANAGER_OPTIMIZATION:=HIGHEST
 else
     LIBFONTMANAGER_EXCLUDE_FILES += fontpath.c \
 				    lcdglyph.c