rdar://problem/11584012

Refactorings of watchpoint creation APIs so that SBTarget::WatchAddress(), SBValue::Watch(), and SBValue::WatchPointee()
now take an additional 'SBError &error' parameter (at the end) to contain the reason if there is some failure in the
operation.  Update 'watchpoint set variable/expression' commands to take advantage of that.

Update existing test cases to reflect the API change and add test cases to verify that the SBError mechanism works for
SBTarget::WatchAddress() by passing an invalid watch_size.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@157964 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/scripts/Python/interface/SBTarget.i b/scripts/Python/interface/SBTarget.i
index e8b6a00..052f4d6 100644
--- a/scripts/Python/interface/SBTarget.i
+++ b/scripts/Python/interface/SBTarget.i
@@ -668,7 +668,8 @@
     WatchAddress (lldb::addr_t addr, 
                   size_t size, 
                   bool read, 
-                  bool write);
+                  bool write,
+                  SBError &error);
              
 
     lldb::SBBroadcaster