Modify test cases to accomodate Python API change:

o SBFrame.LookupVar -> FindVariable
o SBFrame.LookupVarInScope -> FindValue

llvm-svn: 121782
diff --git a/lldb/test/bitfields/TestBitfields.py b/lldb/test/bitfields/TestBitfields.py
index 1627807..dc736b5 100644
--- a/lldb/test/bitfields/TestBitfields.py
+++ b/lldb/test/bitfields/TestBitfields.py
@@ -109,7 +109,7 @@
 
         # Lookup the "bits" variable which contains 8 bitfields.
         frame = thread.GetFrameAtIndex(0)
-        bits = frame.LookupVar("bits")
+        bits = frame.FindVariable("bits")
         self.DebugSBValue(frame, bits)
         self.assertTrue(bits.GetTypeName() == "Bits" and
                         bits.GetNumChildren() == 8 and