[OpenJDK 2D-Dev] RFR: 8144616: Problem building OpenJDK/harfbuzz on jprt

[Phil Race]

Some of our internal build servers only have access to an old (2.3.5) 
version
of freetype whereas harfbuzz requires 2.4.2 - maybe even later, but at 
least that.
The dependency comes from compiling in hb-ft.cc even though we do not
currently use that code since we now go via a custom JDK font driver, 
even in OpenJDK.

The fix is thus to exclude the file from the build and I have verified 
this fix on the
build system that currently fails.

--- a/make/lib/Awt2dLibraries.gmk
+++ b/make/lib/Awt2dLibraries.gmk
@@ -622,9 +622,8 @@
  ifneq ($(OPENJDK_TARGET_OS), macosx)
    LIBFONTMANAGER_EXCLUDE_FILES += harfbuzz/hb-coretext.cc
  endif
-ifndef OPENJDK
+# hb-ft.cc is not presently needed, and requires freetype 2.4.2 or later.
    LIBFONTMANAGER_EXCLUDE_FILES += harfbuzz/hb-ft.cc
-endif

  LIBFONTMANAGER_CFLAGS += $(HARFBUZZ_CFLAGS)

-phil.