Change the rest of lldbutil.py's function names to all lower case formats to be consistent.
And modify the test cases accordingly.

llvm-svn: 130314
diff --git a/lldb/test/class_static/TestStaticVariables.py b/lldb/test/class_static/TestStaticVariables.py
index 465607f..c9f9fc3 100644
--- a/lldb/test/class_static/TestStaticVariables.py
+++ b/lldb/test/class_static/TestStaticVariables.py
@@ -88,9 +88,9 @@
         # The stop reason of the thread should be breakpoint.
         thread = self.process.GetThreadAtIndex(0)
         if thread.GetStopReason() != lldb.eStopReasonBreakpoint:
-            from lldbutil import StopReasonString
+            from lldbutil import stop_reason_to_str
             self.fail(STOPPED_DUE_TO_BREAKPOINT_WITH_STOP_REASON_AS %
-                      StopReasonString(thread.GetStopReason()))
+                      stop_reason_to_str(thread.GetStopReason()))
 
         # Get the SBValue of 'A::g_points' and 'g_points'.
         frame = thread.GetFrameAtIndex(0)