[lldb-tests] Add compiler version check in TestFunctionStarts

[fdeazeve]

Summary

This test requires compiling its input program without debug
information. To do so, it uses certain Makefile variables that are never
populated with custom libcxx paths (if present). Doing so would not
necessarily be correct, since we cannot guaranteed that said standard
library has debug symbols or not.

As such, we keep using the system libraries but to disable the tests in
clang versions that are too old to work with more modern system
libraries, as in the case of the lldb-matrix bot.

[fdeazeve]

Fixed typos in commit message

lldb/test/API/macosx/function-starts/TestFunctionStarts.py

 exe_name = "StripMe"  # Must match Makefile
 
 class FunctionStartsTestCase(TestBase):
 
     NO_DEBUG_INFO_TESTCASE = True
 
     @skipIfRemote
     @skipUnlessDarwin
+    @skipIf(compiler="clang", compiler_version=['<', '13.0'])
     def test_function_starts_binary(self):
         """Test that we make synthetic symbols when we have the binary."""
         self.build(dictionary={'CODESIGN': ''}) # Binary is getting stripped later.
         self.do_function_starts(False)
 
     @skipIfRemote
     @skipUnlessDarwin
+    @skipIf(compiler="clang", compiler_version=['<', '13.0'])
     def test_function_starts_no_binary(self):
         """Test that we make synthetic symbols when we don't have the binary"""
         self.build(dictionary={'CODESIGN': ''}) # Binary is getting stripped later.
         self.do_function_starts(True)
 
     def do_function_starts(self, in_memory):
         """Run the binary, stop at our unstripped function,
            make sure the caller has synthetic symbols"""