pawn: fixed to install standard include files

develop/pawn/pawn.conf

@@ -29,6 +29,9 @@ pkg_pawn_postmake() {
 	ln -svf libpawnc.so.$majorver.$minorver libpawnc.so.$majorver
 	ln -svf libpawnc.so.$majorver libpawnc.so
 	cp -avp libpawnc.so* $root$libdir/
+	# install include files
+	mkdir -p $root$includedir/$pkg
+	cp -avp ../../../include/*.inc $root$includedir/$pkg
 }
 
 hook_add postmake 5 "pkg_pawn_postmake"