fix missing import of 'time' in lldbutil.wait_for_file_on_target (#12)
fix missing import of 'time' in lldbutil.wait_for_file_on_target (#12)

This triggers in some timeout scenarios in the LLDB test suite.

Fixes:
https://bugs.swift.org/browse/SR-1193

git-svn-id: 4c4cc70b1ef44ba2b7963015e681894188cea27e@265821 91177308-0d34-0410-b5e6-96231b3b80d8
apple/swift-lldb,apple/swift-lldb,apple/swift-lldb,apple/swift-lldb,apple/swift-lldb,apple/swift-lldb