Properly skip TestUniversal.

[chaoren]

Summary

Avoid calling os.uname() unless OS is Darwin.

[chaoren]

Abandoning this in favor of D10202.

test/macosx/universal/TestUniversal.py

 """Test aspects of lldb commands on universal binaries."""
 
-import os, time
+import os, time, sys
 import unittest2
 import lldb
 from lldbtest import *
 import lldbutil
 
 class UniversalTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
     def setUp(self):
         # Call super's setUp().
         TestBase.setUp(self)
         # Find the line number to break inside main().
         self.line = line_number('main.c', '// Set break point at this line.')
 
     @python_api_test
-    @skipUnlessDarwin
-    @unittest2.skipUnless(os.uname()[4] in ['i386', 'x86_64'], "requires i386 or x86_64")
+    @unittest2.skipUnless(
+            sys.platform.startswith('darwin') and
+            os.uname()[4] in ['i386', 'x86_64'],
+            "requires i386 or x86_64")
     def test_sbdebugger_create_target_with_file_and_target_triple(self):
         """Test the SBDebugger.CreateTargetWithFileAndTargetTriple() API."""
         # Invoke the default build rule.
         self.buildDefault()
 
         # Note that "testit" is a universal binary.
         exe = os.path.join(os.getcwd(), "testit")
 
         # Create a target by the debugger.
         target = self.dbg.CreateTargetWithFileAndTargetTriple(exe, "i386-apple-macosx")
         self.assertTrue(target, VALID_TARGET)
 
         # Now launch the process, and do not stop at entry point.
         process = target.LaunchSimple (None, None, self.get_process_working_directory())
         self.assertTrue(process, PROCESS_IS_VALID)
 
-    @skipUnlessDarwin
-    @unittest2.skipUnless(os.uname()[4] in ['i386', 'x86_64'], "requires i386 or x86_64")
+    @unittest2.skipUnless(
+            sys.platform.startswith('darwin') and
+            os.uname()[4] in ['i386', 'x86_64'],
+            "requires i386 or x86_64")
     def test_process_launch_for_universal(self):
         """Test process launch of a universal binary."""
         from lldbutil import print_registers
 
         # Invoke the default build rule.
         self.buildDefault()
 
         # Note that "testit" is a universal binary.