RFC: [PATCH] Make default compression gABI compliant

[Cary Coutant]

> gold/
>
>         * compressed_output.cc (Output_compressed_section::set_final_data_size):
>         Make --compress-debug-sections=zlib the same as
>         --compress-debug-sections=zlib-gabi.
>         * testsuite/Makefile.am (flagstest_compress_debug_sections.check):
>         Expect ".debug_.*" with the SHF_COMPRESSED bit, instead of
>         ".zdebug_".
>         * testsuite/Makefile.in: Regenerated.

This part is OK with me.

-cary