Another improvement to receive_patch
Another improvement to receive_patch

My last improvement to receive_patch tucked a copy of the current
diffs to CHPL_HOME in a backup file before reverting.  After chatting
with Sung, this commit is a slight improvement in which the auto
backup file is uniquified by the name of the patch being applied so
that if you run multiple distinct receive_patches in a short amount of
time, you won't keep blowing away the single backup patch.



git-svn-id: 88467cb1fb04b8a755be7e1ee1026be4190196ef@19790 3a8e244f-b0f2-452b-bcba-4c88e055c3ca

sungeunchoi/chapel,hildeth/chapel,sungeunchoi/chapel,hildeth/chapel,CoryMcCartan/chapel,hildeth/chapel,CoryMcCartan/chapel,sungeunchoi/chapel,hildeth/chapel,CoryMcCartan/chapel,sungeunchoi/chapel,chizarlicious/chapel,hildeth/chapel,chizarlicious/chapel,chizarlicious/chapel,sungeunchoi/chapel,CoryMcCartan/chapel,sungeunchoi/chapel,chizarlicious/chapel,sungeunchoi/chapel,CoryMcCartan/chapel,chizarlicious/chapel,CoryMcCartan/chapel,sungeunchoi/chapel,chizarlicious/chapel,chizarlicious/chapel,hildeth/chapel,CoryMcCartan/chapel,hildeth/chapel