Update compiler_specific.hpp

Fixed #113(: hpx / hpx / config / compiler_specific.hpp
Minor cosmetic change.
Revert "Minor cosmetic change."

This reverts commit c1ddfc22bf62444ba1b605a6185e9748e1a217a3.
Merge remote-tracking branch 'upstream/master' into n3960
Merge remote-tracking branch 'upstream/n3960' into n3960
Merge remote-tracking branch 'upstream/n3960' into n3960
copy implimentation started
initial copy finished, testing file started
Merge remote-tracking branch 'upstream/n3960' into n3960
copy.cpp now properly tests hpx::parallel::copy
Merge remote-tracking branch 'upstream/n3960' into n3960
removed unfinished exception_test function
Merge pull request #1145 from Syntaf/n3960

N3960 hpx::parallel::copy implemented and tested