Reflect matching results to binding in FcPattern

This change allows applications to see what property was matched perfectly
and help to filter out for their needs.

Fixes fontconfig/fontconfig#294
11 jobs for fix-binding in 7 minutes and 58 seconds (queued for 15 seconds)
Status Name Job ID Coverage
  Build
passed meson android arm64 fedora #13050678

00:01:43

passed meson macos #13050676
gst-macos-10.15

00:03:11

passed meson-mingw-w64-build #13050673

00:05:58

manual meson msys2 #13050677
docker windows 1809 allowed to fail manual
passed meson-shared-build #13050671

00:07:02

passed meson-static-build #13050672

00:06:26

passed meson vs2017 amd64 #13050674
docker windows 1809

00:01:16

passed meson vs2017 x86 #13050675
docker windows 1809

00:01:15

passed mingw-build #13050670

00:06:26

passed shared-build #13050668

00:07:58

passed static-build #13050669

00:06:18