Work around broken automake-1.13 changes.

Fix tests build.

https://bugs.freedesktop.org/show_bug.cgi?id=71353

Even though this is not what autoconf recommends, it reduces doc
rebuilds when version doesn't change but configure changes.

They've been disabled for a while and no one cared.  We're past
the point to need them for testing, and if we ever need to
resurrect them again, well, they're in git graveyard somewhere.

Also enable bootstrapping without them.

Move it to new harfbuzz-gobject library.  Implement enums and
boxed types for object-types.  Still have to do boxed types for
value types.

Initial setup of gtk-doc. Straight forward setup following the gtk-doc
instructions. Ignore some troublesome types in src/hb-gobject.h. To
build use "./autogen.sh --enable-gtk-doc" then "make". Docs are in
harfbuzz/docs/reference/html/index.html.

When installing per-process fonts using AddFontMemResourceEx(),
if a font with the same family name is already installed, sometimes
that one gets used.  Which is problematic for us.  As such, we
now mangle the font to install a new 'name' table with a unique
name, which we then use to choose the font.

Patch from Jonathan Kew.

Oops.

Bug 65246 - Fix build without graphite2

Bug 65246 - Fix build without graphite2

If we don't provide ACTION-IF-NOT-FOUND, configure aborts if it can't
find the libraries.  We handle that ourselves so we don't want the
macro to abort.

Currently it only works with ICU that has .pc files.  I'll
wait till someone complains before fixing it for icu-config
systems.

Fallback to older API if OpenType variants are not available.

Defaults to auto.

Defaults to no.

Defaults to no.

We only want UCDN if we don't have any other Unicode provider.
I'm going to remove ICU from the list of default Unicode providers
as part of moving hb-icu into its own library.  As such, the only
providers will be UCDN and glib.

Will add a way to enable it later.

Bug 64878 - compile error with ICU but not ICU

Will add proper way to enable it later.

Add --with-graphite2.  Defaults to off.

This is not ideal as we don't like -L/usr/lib in our linker line.
But this is only relevant to environments that don't have pkgconfig
files for ICU...

https://github.com/behdad/harfbuzz/pull/2

Sigh..

Bug 64039 - undefined macro AM_PROG_AR