[Fontconfig] Fontconfig 2.7.1 released

[Behdad Esfahbod]

Summary of changes:

2.7.1

Behdad Esfahbod (16):
       git-tag -s again
       Fix win32 build
       Replace spaces with tabs in conf files
       Remove unused ftglue code
       Add Inconsolata to monospace config (#22710)
       Fix leak with string VStack objects
       Improve libtool version parsing (#22122)
       Use GetSystemWindowsDirectory() instead of GetWindowsDirectory() (#22037)
       Remove unused macros
       Fix FcNameUnparseLangSet()
       Fix doc syntax (#22902)
       TT_MS_ID_UCS_4 is really UTF-16BE, not UTF-32
       [doc] Add ~/fonts.conf.d to user docs
       Hardcode /etc/fonts instead of @CONFDIR@ in docs (#22911)
       Bump libtool versions that 2.7.0 (I forgot to do back then)
       Update .gitignore