common.mk: update "make help" so that "make check" now runs test-spec

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64505 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

common.mk

@@ -1394,8 +1394,8 @@ help: PHONY
 	"  runruby:             runs test.rb by ruby you just built" \
 	"  gdb:                 runs test.rb by miniruby under gdb" \
 	"  gdb-ruby:            runs test.rb by ruby under gdb" \
-	"  check:               equals make test test-all" \
-	"  exam:                equals make check test-spec" \
+	"  check:               equals make test test-all test-spec" \
+	"  exam:                equals make check" \
 	"  test:                ruby core tests" \
 	"  test-all:            all ruby tests [TESTOPTS=-j4 TESTS=<test files>]" \
 	"  test-spec:           run the Ruby spec suite" \