.travis.yml: avoid Valgrind bug with '-march=native' #171
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The switch in #163 to
-march=native
exposed a Valgrind bug on the Travis CI machines, see e.g. build 436 and following:Possibly fixed in Valgrind 3.10, see upstream bug https://bugs.kde.org/show_bug.cgi?id=326469.
This pull-request temporarily changes the
-march=native
flags back to-msse4.2
after the generation of the gmake files. I still think that the original change in #163 is reasonable.