Also, call c++filt on their results.

Also build and fix and check harfbuzz-gobject.def

Also changes harfbuzz-gobject to distribute generated enum sources.

[subset] Add hdmx subsetting.

[subset] Fix checksum clearning in subset test diff. Add an updated expected file (has cmap4 restored).

More readable.

Fixes https://github.com/harfbuzz/harfbuzz/issues/817

More information: http://editorconfig.org/

[subset] fix calculation of range shiftz. Should be 16 * len - searchRange not 16 * (len - searchRange).

Clean up of glyf subsetting.

I know it's bad form; I know I've said no to this multiple times...
But this is part of an experiment to see if we can make rolling HarfBuzz
into Chrome much faster. That will give us a lot more testing exposure
that currently Chrome does.

Doing this while those files are still considered ignored by our
gitignore rules; will see how that flies.

Some of our bots / compilers don't like it. Wasn't caught by bots because this
is only in debug code.

https://github.com/harfbuzz/harfbuzz/pull/809/commits/825ad378e0f0e6e6bb690894a0d5d25f198be21b