dosep - force timeout processes to dump core when they timeout
dosep - force timeout processes to dump core when they timeout

move all core files to the session dir after all tests have completed

TEST PLAN
Run tests. Force a timeout by decreasing a timeout
export LLDB_EVENTS_TIMEOUT=10s
./dosep.py

Differential Revision: http://reviews.llvm.org/D9905



git-svn-id: 4c4cc70b1ef44ba2b7963015e681894188cea27e@238281 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lldb,apple/swift-lldb,apple/swift-lldb,apple/swift-lldb,apple/swift-lldb,llvm-mirror/lldb,llvm-mirror/lldb,llvm-mirror/lldb,llvm-mirror/lldb,apple/swift-lldb,apple/swift-lldb