Add needed Clear methods.
<rdar://problem/10596340>


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@146902 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/scripts/Python/interface/SBValue.i b/scripts/Python/interface/SBValue.i
index a1ab884..a9878a2 100644
--- a/scripts/Python/interface/SBValue.i
+++ b/scripts/Python/interface/SBValue.i
@@ -67,6 +67,9 @@
     bool
     IsValid();
     
+    void
+    Clear();
+    
     SBError
     GetError();