test: Utilize distcheck in CI; it tests pretty much everything we want to test

Signed-off-by: Jacques de Laval <jacques@de-laval.se>

.travis.yml

@@ -52,8 +52,6 @@ script:
   - cat config.log
   - make clean
   - make V=1 -j5
-  - LD_LIBRARY_PATH=/tmp/lib make check
-  - cat ./test/test-suite.log
   - make install-strip
   - tree /tmp
   - ldd /tmp/sbin/finit
@@ -64,5 +62,4 @@ script:
   - unshare -V
   - nsenter -V
   - chroot --version
-  - LD_LIBRARY_PATH=/tmp/lib make check
-  - cat ./test/test-suite.log
+  - LD_LIBRARY_PATH=/tmp/lib make distcheck