Properly export fribidi_unicode_version

[CoffeeFlux]

Resolves #109

I can't actually test on this machine to verify it solves the issue, so if someone else quickly could that would be fantastic (@moham96?).

To ensure issues like this don't crop up in the future it would probably be best to pass -fvisibility=hidden to autotools builds as well, but I think that's best addressed by someone more familiar with it than I.

[moham96]

Yes I can confirm that this patch fixes the problem in meson build, hopefully there will be a new release of fribidi soon so archlinux package can have this fix, in the meantime i will suggest the patch to the package maintainer.
Thanks for the quick fix.

[khaledhosny]

Thanks!

[muktupavels]

/mnt/wd20ezrx-00dc0b0/JHBuild/latest/install/include/fribidi/fribidi.h:55:27: error: redundant redeclaration of ‘fribidi_unicode_version’ [-Werror=redundant-decls]
 FRIBIDI_ENTRY const char *fribidi_unicode_version;
                           ^~~~~~~~~~~~~~~~~~~~~~~
In file included from /mnt/wd20ezrx-00dc0b0/JHBuild/latest/install/include/fribidi/fribidi.h:31,
                 from ../pango/pango-bidi-type.c:44:
/mnt/wd20ezrx-00dc0b0/JHBuild/latest/install/include/fribidi/fribidi-unicode.h:48:20: note: previous declaration of ‘fribidi_unicode_version’ was here
 extern const char *fribidi_unicode_version;
                    ^~~~~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
ninja: build stopped: subcommand failed.

Pango fails to build with above error after this change.

[khaledhosny]

Should be fixed now.

[CoffeeFlux]

Ah yep, sorry about that.