.travis.yml: Enable C99 mode for older gcc versions
authorDavid Gibson <david@gibson.dropbear.id.au>
Wed, 23 Nov 2016 12:12:59 +0000 (23:12 +1100)
committerDavid Gibson <david@gibson.dropbear.id.au>
Wed, 23 Nov 2016 12:12:59 +0000 (23:12 +1100)
commit18cbdae86fd7d387a625f1140b8288ed634658e1
treee92fbc52d9deae40a1ae1acb60dfbbeab68a3664
parente0663bef2ec73ed33b22e5a029284296495aab87
.travis.yml: Enable C99 mode for older gcc versions

Currently Travis builds fail on the edit_distance module, because that
module uses C99 extensions, which aren't enabled by default on the
Ubuntu Precise compiler version.  Force it to allow these, by adding the
-std=gnu99 option to the compiler.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
.travis.yml