8304295: harfbuzz build fails with GCC 7 after JDK-8301998

Backport-of: 34e66ce1ef2decc81557a362d6242313e98417fa

Author: mrserb

make/modules/java.desktop/lib/Awt2dLibraries.gmk

@@ -470,7 +470,8 @@ else
 
    HARFBUZZ_DISABLED_WARNINGS_gcc := missing-field-initializers strict-aliasing \
        unused-result
-   HARFBUZZ_DISABLED_WARNINGS_CXX_gcc := class-memaccess
+   # noexcept-type required for GCC 7 builds. Not required for GCC 8+.
+   HARFBUZZ_DISABLED_WARNINGS_CXX_gcc := class-memaccess noexcept-type
    HARFBUZZ_DISABLED_WARNINGS_clang := missing-field-initializers range-loop-analysis
    HARFBUZZ_DISABLED_WARNINGS_microsoft := 4267 4244