* Previously -break-enable mistakenly set BP's enabled flag to false.
* These commands print fake =breakpoint-modified messages, what's not
needed anymore because that events are come in normal way.
* Add tests for -break-enable/-break-disable commands
Initial patch from xuefangliang@hotmail.com. The test case was improved by me.
Differential Revision: http://reviews.llvm.org/D21757
llvm-svn: 275381