Fix lcov coverage

Author: mdboom

Makefile.pre.in

@@ -698,7 +698,7 @@ coverage-lcov:
 # Force regeneration of parser and frozen modules
 coverage-report-lcov: regen-token regen-frozen
 @ # build with coverage info
-$(MAKE) coverage
+$(MAKE) coverage-gcc
 @ # run tests, ignore failures
 $(TESTRUNNER) $(TESTOPTS) || true
 @ # build lcov report