test_framework.rb: for case-sensitive filesystem

* test/mkmf/test_framework.rb (test_single_framework): fix header
  file name for case-sensitive filesystem.  it may not be same as
  the framework name, but should be the actual file name.
  [ruby-dev:50093] [Bug #13489]

* test/mkmf/test_framework.rb (test_multi_frameworks): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58431 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/mkmf/test_framework.rb

@@ -22,11 +22,11 @@ class TestMkmf
     end
 
     def test_single_framework
-      assert(have_framework("Ruby"), mkmflog("try as Objective-C"))
+      assert(have_framework(%w"Ruby ruby.h"), mkmflog("try as Objective-C"))
     end
 
     def test_multi_frameworks
-      assert(have_framework("Ruby"), mkmflog("try as Objective-C"))
+      assert(have_framework(%w"Ruby ruby.h"), mkmflog("try as Objective-C"))
       create_framework("MkmfTest") do |fw|
         assert(have_framework(fw), MKMFLOG)
       end