travis: Skip first compilation for Linux builds

We already perform a full build as part of distcheck, so
we can speed things up a bit by skipping the first
compilation.
Signed-off-by: NAndrea Bolognani <abologna@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>

.travis.yml

@@ -48,7 +48,6 @@ env:
         apt-get update &&
         apt-get install -y \$PACKAGES &&
         ./autogen.sh &&
-        make -j3 &&
         make -j3 syntax-check &&
         make -j3 distcheck DISTCHECK_CONFIGURE_FLAGS=\"\$DISTCHECK_CONFIGURE_FLAGS\" ||
         (