Fix Mac fontconfig build (try 2)

third_party/fontconfig/config/mac/config.h.template

Index: third_party/fontconfig/config/mac/config.h.template
diff --git a/third_party/fontconfig/config/mac/config.h b/third_party/fontconfig/config/mac/config.h.template
similarity index 98%
rename from third_party/fontconfig/config/mac/config.h
rename to third_party/fontconfig/config/mac/config.h.template
index 963ede849453d4c8f63194e7e43c97ff907ae12c..3eea946a19b39d9ef4a2df3bb02e4df90d51d459 100644
--- a/third_party/fontconfig/config/mac/config.h
+++ b/third_party/fontconfig/config/mac/config.h.template
@@ -1,6 +1,10 @@
 /* config.h.  Generated from config.h.in by configure.  */
 /* config.h.in.  Generated from configure.ac by autoheader.  */
 
+/* Manually added template defines */
+#define FC_CACHEDIR "@FC_CACHEDIR@"
+#define FONTCONFIG_PATH "@FONTCONFIG_PATH@"
+
 /* Define if building universal (internal helper macro) */
 /* #undef AC_APPLE_UNIVERSAL_BUILD */
 
@@ -11,7 +15,7 @@
 /* #undef ENABLE_LIBXML2 */
 
 /* Additional font directories */
-#define FC_ADD_FONTS "yes"
+#define FC_ADD_FONTS "/System/Library/Fonts,/Library/Fonts"
 
 /* Architecture prefix to use for cache file names */
 /* #undef FC_ARCHITECTURE */