grep: stop leaving temp directories around
grep: stop leaving temp directories around

This test should no longer need to use real files, it could easily use a
mocked out file system, but it should not at least leave junk lying around
in the file system.

Signed-off-by: Ronald G. Minnich <f569d0af9a3481c4007b95c7180d6c41009f2513@gmail.com>

hugelgupf/u-root,u-root/u-root,rminnich/u-root,hugelgupf/u-root,GanShun/u-root,u-root/u-root,rminnich/u-root,rminnich/u-root,u-root/u-root,hugelgupf/u-root,GanShun/u-root,rminnich/u-root,GanShun/u-root,hugelgupf/u-root