Fix Travis-CI WERROR support.

.travis.yml

@@ -93,10 +93,10 @@ install:
   - export TEST_TOOLCHAIN="${TRAVIS_BUILD_DIR}/selinux"
 
   # Drop build.conf settings to listen to env vars
-  - sed -r -i -e '/(MONOLITHIC|TYPE|DISTRO|SYSTEMD)/d' build.conf
+  - sed -r -i -e '/(MONOLITHIC|TYPE|DISTRO|SYSTEMD|WERROR)/d' build.conf
 
 script:
-  - echo $TYPE $DISTRO $MONOLITHIC $SYSTEMD
+  - echo $TYPE $DISTRO $MONOLITHIC $SYSTEMD $WERROR
   - make bare
   - make conf
   - make