File clanlib-add-aarch64.patch of Package clanlib

--- ClanLib-4.1.0/configure.ac.orig	2021-06-16 14:04:48.744184558 +0200
+++ ClanLib-4.1.0/configure.ac	2021-06-16 14:09:15.738679727 +0200
@@ -118,6 +118,10 @@ case $target in
 		CXXFLAGS="$CXXFLAGS -DARM_PLATFORM"
 		CFLAGS="$CXXFLAGS -DARM_PLATFORM"
 		;;
+	aarch64* )
+		CXXFLAGS="$CXXFLAGS -DARM_PLATFORM"
+		CFLAGS="$CXXFLAGS -DARM_PLATFORM"
+		;;
 esac
 
 dnl Extra flags that are needed to compile (for pkg-config)