fontconfig: Fix namespace conflicts with glibc
glibc 2.25 will come with TS 18661-1 macro definitions in limits.h which ends with following errors
| ../../fontconfig-2.12.1/src/fcmatch.c:324:63: error: 'PRI_CHAR_WIDTH_STRONG' undeclared here (not in a function)
| #define FC_OBJECT(NAME, Type, Cmp) { FC_##NAME##_OBJECT, Cmp, PRI_##NAME##_STRONG, PRI_##NAME##_WEAK },
| ^
| ../../fontconfig-2.12.1/src/fcobjs.h:54:1: note: in expansion of macro 'FC_OBJECT'
| FC_OBJECT (CHAR_WIDTH, FcTypeInteger, NULL)
| ^~~~~~~~~
| ../../fontconfig-2.12.1/src/fcmatch.c:324:84: error: 'PRI_CHAR_WIDTH_WEAK' undeclared here (not in a function)
| #define FC_OBJECT(NAME, Type, Cmp) { FC_##NAME##_OBJECT, Cmp, PRI_##NAME##_STRONG, PRI_##NAME##_WEAK },
| ^
| ../../fontconfig-2.12.1/src/fcobjs.h:54:1: note: in expansion of macro 'FC_OBJECT'
| FC_OBJECT (CHAR_WIDTH, FcTypeInteger, NULL)
| ^~~~~~~~~
| make[3]: *** [Makefile:632: fcmatch.lo] Error 1
(From OE-Core rev:
3575826752e7140da493c7f560fb5fcf483fc9b4)
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
