Apply patch to restore prior and working state:

Steve Kargl has noticed severely inaccurate results for some functions and
has reported the issue as https://github.com/JuliaMath/openlibm/issues/215

This port update applies the patch he has suggested to the up-stream and
which has been tested by him to fix the issue (see the Github issue for
details and test results).

While here adjust indentation and remove white-space from an empty line.

Submitted by: Steve Kargl (sgk at troutmask.apl.washington.edu)