[lldb] Fix TLS support on Darwin platforms (llvm#151601)

When I wrote this previously, I was unaware that the TLS function
already adds the offset. The test was working previously because the
offset was 0 in this case (only 1 thread-local variable). I added
another thread-local variable to the test to make sure the offset is
indeed handled correctly.

rdar://156547548
(cherry picked from commit a27d34b)

Author: bulbazord

lldb/test/API/lang/c/tls_globals/TestTlsGlobals.py

@@ -78,6 +78,11 @@ def test(self):
             VARIABLES_DISPLAYED_CORRECTLY,
             patterns=[r"\(int\) \$.* = 66"],
         )
+        self.expect(
+            "expr var_static2",
+            VARIABLES_DISPLAYED_CORRECTLY,
+            patterns=[r"\(int\) \$.* = 66"],
+        )
         self.expect(
             "expr var_shared",
             VARIABLES_DISPLAYED_CORRECTLY,
@@ -114,6 +119,11 @@ def test(self):
             VARIABLES_DISPLAYED_CORRECTLY,
             patterns=[r"\(int\) \$.* = 22"],
         )
+        self.expect(
+            "expr var_static2",
+            VARIABLES_DISPLAYED_CORRECTLY,
+            patterns=[r"\(int\) \$.* = 22"],
+        )
         self.expect(
             "expr var_shared",
             VARIABLES_DISPLAYED_CORRECTLY,