[8u66] 8130938: Incomplete 8ux fix for 8071710: libfontmanager & t2k should link against headless awt on solaris

[Phil Race]

Bug : https://bugs.openjdk.java.net/browse/JDK-8130938

8071710 fixed the issue of libfontmanager and libt2k linking against X11 
on JDK 9 for Solaris.
This was subsequently backported to JDK8u but one line was missed so 
incorrectly libt2k
still depends on X11 libraries on 8u.

This is a request for review and approval to push to 8u66.

The one line change is in-line below. jprt verified the build.

hg diff make/lib/Awt2dLibraries.gmk
diff --git a/make/lib/Awt2dLibraries.gmk b/make/lib/Awt2dLibraries.gmk
--- a/make/lib/Awt2dLibraries.gmk
+++ b/make/lib/Awt2dLibraries.gmk
@@ -983,7 +983,7 @@
            $(call SET_SHARED_LIBRARY_ORIGIN), \
        LDFLAGS_windows := user32.lib 
$(JDK_OUTPUTDIR)/objs/libfontmanager/fontmanager.lib, \
        LDFLAGS_SUFFIX_posix := $(LIBM) $(LIBCXX) -lfontmanager -ljava 
-ljvm -lc, \
-      LDFLAGS_SUFFIX_solaris := -lawt -lawt_xawt, \
+      LDFLAGS_SUFFIX_solaris := -lawt -lawt_headless, \
        VERSIONINFO_RESOURCE := 
$(JDK_TOPDIR)/src/windows/resource/version.rc, \
        RC_FLAGS := $(RC_FLAGS) \
            -D "JDK_FNAME=t2k.dll" \

-phil.