Checking in fixes that I used to track down a leaking module. The heap module...

Checking in fixes that I used to track down a leaking module. The heap module can now search the vm regions with the --vm-regions options to any of the heap functions. This is currently slow and often will time out when run on a large program since our user expression timeout is set to 500000 usec. We need to add an API to LLDB where we can specify the timeout for an expression.

llvm-svn: 165437