[lldb] Skip tests incompatible with older versions of Clang

The coroutine tests require a standard library implementation of
coroutines, which was only made available some time _after_ Clang 13.
The first such Clang tested by the LLDB matrix bot is 15.0.1

The TestObjCExceptions test forces the use of the system's libcxx. For
the lldb matrix bot, the first Clang version compatible with the bot's
libraries is 13.0.

Differential Revision: https://reviews.llvm.org/D134645

lldb/test/API/functionalities/data-formatter/data-formatter-stl/generic/coroutine_handle/TestCoroutineHandle.py

@@ -79,5 +79,6 @@ class TestCoroutineHandle(TestBase):
         self.do_test(USE_LIBSTDCPP)
 
     @add_test_categories(["libc++"])
+    @skipIf(compiler="clang", compiler_version=['<', '15.0'])
     def test_libcpp(self):
         self.do_test(USE_LIBCPP)

lldb/test/API/lang/objc/exceptions/TestObjCExceptions.py

@@ -13,6 +13,7 @@ from lldbsuite.test import lldbutil
 
 class ObjCExceptionsTestCase(TestBase):
 
+    @skipIf(compiler="clang", compiler_version=['<', '13.0'])
     def test_objc_exceptions_at_throw(self):
         self.build()
 
@@ -123,6 +124,7 @@ class ObjCExceptionsTestCase(TestBase):
         for n in ["objc_exception_throw", "foo(int)", "main"]:
             self.assertIn(n, names, "%s is in the exception backtrace (%s)" % (n, names))
 
+    @skipIf(compiler="clang", compiler_version=['<', '13.0'])
     def test_objc_exceptions_at_abort(self):
         self.build()
 
@@ -179,6 +181,7 @@ class ObjCExceptionsTestCase(TestBase):
         for n in ["objc_exception_throw", "foo(int)", "rethrow(int)", "main"]:
             self.assertEqual(len([f for f in history_thread.frames if f.GetFunctionName() == n]), 1)
 
+    @skipIf(compiler="clang", compiler_version=['<', '13.0'])
     def test_cxx_exceptions_at_abort(self):
         self.build()