is defined.  Use ${LLDB_LOG} to specify the log file.

Create a singleton SBDebugger in the lldb namespace, that gets used when running
the entire test suite.

llvm-svn: 107445

this seems to alleviate the intermittent failure observed while running the
whole test suite.

llvm-svn: 107357

llvm-svn: 107221

Also modified dotest.py so that it sets the LLDB_TEST environment variable
so that individual test cases can locate their supporting files correctly.

llvm-svn: 107220

lldb.SBDebugger.Initialize()/Terminate() pair.

Change TestHelp.py to use synchronous debugging, which is easier to work with.

llvm-svn: 107198

shell and issuing 'help' would hang (was actually infinitely looping).

llvm-svn: 107066

llvm-svn: 106909