[testsuite] Un-XFAIL a test with global variables

[davide]

Summary

Turns out this was fixed in LLVM a while ago. I propose to reenable, as currently it's annoyingly reported as an unexpected success

[davide]

Link to the upstream PR: https://llvm.org/pr25872

[davide]

I'll go ahead and merge this and see if the bots are happy still. Feel free to add a post commit review.

lldb/trunk/packages/Python/lldbsuite/test/lang/c/global_variables/TestGlobalVariables.py

def setUp(self):
         TestBase.setUp(self)
         # Find the line number to break inside main().
         self.source = 'main.c'
         self.line = line_number(
             self.source, '// Set break point at this line.')
         self.shlib_names = ["a"]
 
     @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24764")
-    @expectedFailureAll(
-        "llvm.org/pr25872, <rdar://problem/28725399>",
-        oslist=["macosx"],
-        debug_info=[
-            "dwarf",
-            "gmodules"])
     def test_c_global_variables(self):
         """Test 'frame variable --scope --no-args' which omits args and shows scopes."""
         self.build()
 
         # Create a target by the debugger.
         target = self.dbg.CreateTarget("a.out")
         self.assertTrue(target, VALID_TARGET)