Pend tests on Travis CI

Author: hsbt

test/rubygems/test_gem_package.rb

@@ -513,6 +513,7 @@ def test_extract_files_empty
 
   def test_extract_file_permissions
     pend "chmod not supported" if Gem.win_platform?
+    pend "Travis CI enable writable permission to group" if ENV['TRAVIS']
 
     gem_with_long_permissions = File.expand_path("packages/Bluebie-legs-0.6.2.gem", __dir__)
 
@@ -528,6 +529,7 @@ def test_extract_file_permissions
 
   def test_extract_file_umask_global_permissions
     pend "chmod not supported" if Gem.win_platform?
+    pend "Travis CI enable writable permission to group" if ENV['TRAVIS']
 
     package = Gem::Package.new @gem