lit: support redirect from globs

This adds support for commands like

FileCheck < foobar*

which is used by some asan tests because the file they want to read
has a pid in the name.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@299111 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed