8307569: Build with gcc8 is broken after JDK-8307301

Reviewed-by: mdoerr
Backport-of: 64c09628664fd19c281723f15bf677c52e360acd

Author: GoeLin

make/lib/Awt2dLibraries.gmk

@@ -561,8 +561,9 @@ else
 
   HARFBUZZ_DISABLED_WARNINGS_gcc := type-limits missing-field-initializers strict-aliasing
   # noexcept-type required for GCC 7 builds. Not required for GCC 8+.
+  # expansion-to-defined required for GCC 9 builds. Not required for GCC 10+.
   HARFBUZZ_DISABLED_WARNINGS_CXX_gcc := reorder delete-non-virtual-dtor strict-overflow \
-       maybe-uninitialized class-memaccess unused-result extra noexcept-type
+       maybe-uninitialized class-memaccess unused-result extra noexcept-type expansion-to-defined
   HARFBUZZ_DISABLED_WARNINGS_clang := unused-value incompatible-pointer-types \
        tautological-constant-out-of-range-compare int-to-pointer-cast \
        undef missing-field-initializers deprecated-declarations c++11-narrowing range-loop-analysis