[make] Remove \r from haxelib libpath output

Otherwise we end up with the carriage return still being there on
windows.

Makefile

@@ -118,7 +118,7 @@ haxelib_hxcpp: $(HAXELIB_SRC_PATH)/haxelib_hxb.zip
 	$(HAXELIB_INTERP) config > /dev/null || $(HAXELIB_INTERP) newrepo
 	$(HAXELIB_INTERP) path hxcpp > /dev/null || \
 		($(HAXELIB_INTERP) git hxcpp https://github.com/HaxeFoundation/hxcpp.git && \
-		hxcpp_path=`$(HAXELIB_INTERP) libpath hxcpp` && \
+		hxcpp_path=`$(HAXELIB_INTERP) libpath hxcpp | tr -d '\r'` && \
 		$(CURDIR)/$(HAXE_OUTPUT) --cwd $$hxcpp_path/tools/hxcpp compile.hxml)
 
 # haxelib should depends on haxe, but we don't want to do that...