http-parser: create include directory if necessary

Change-Id: If293ca93434f5e53dd3bc968ea81e218ccfb9651

contrib/src/http_parser/rules.mak

@@ -21,6 +21,7 @@ http_parser: http-parser-$(HTTP_PARSER_VERSION).tar.gz
 
 .http_parser: http_parser toolchain.cmake .sum-http_parser
 	cd $< && $(HOSTVARS) $(MAKE) $(HTTP_PARSER_MAKECONF) package
+	mkdir -p $(PREFIX)/include
 	mkdir -p $(PREFIX)/lib
 	cd $< && cp -f http_parser.h $(PREFIX)/include && cp -f libhttp_parser.a $(PREFIX)/lib
 	touch $@