btl/sm: fix race condition #1245
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write to file and then rename, so when the file is open for read, its content is known to have been written. Fixes #1230
jsquyres
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Aug 23, 2016
common/ugni: help out knl with aries
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write to file and then rename, so when the file is open for read, its content is known to have been written.
Fixes #1230