* messon.build: Install `include/freetype/ftlogging.h`.

Fixes #1292.
diff --git a/meson.build b/meson.build
index bedf132..5126e0f 100644
--- a/meson.build
+++ b/meson.build
@@ -159,6 +159,7 @@
   'include/freetype/ftincrem.h',
   'include/freetype/ftlcdfil.h',
   'include/freetype/ftlist.h',
+  'include/freetype/ftlogging.h',
   'include/freetype/ftlzw.h',
   'include/freetype/ftmac.h',
   'include/freetype/ftmm.h',