libxft: upgrade 2.3.8 -> 2.3.9

libxft: upgrade 2.3.8 -> 2.3.9

Changelog:
==========
- manpage formatting-fixes
- meson: Add option to build with meson
- Require xproto >= 7.0.22 for _X_UNUSED
- Remove support for building with pre-C89 versions of C
- Remove support for building with pre-X11R7 versions of X
- fix potential buffer overrun in _XftGlyphDefault
- issue 21: remove redundant/out-of-place prototype for XftNameUnparse
- build-fix for older versions of freetype2: FT_HAS_SVG was added late in 2021
- issue 19: Problem loading "SourceCodePro-Regular" font in Fedora

Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>