travis: run tests in verbose mode

Travis sometimes fails a build because it produces no console output for
over 10 minutes. If this is due to a genuine hang, it would be useful to
have used verbose test output to see where it failed. If this is just
due to tests being very slow, having verbose output might allow the
build to succeed.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

.travis.yml

@@ -61,7 +61,7 @@ env:
   global:
     - SRC_DIR="."
     - BUILD_DIR="."
-    - TEST_CMD="make check -j3"
+    - TEST_CMD="make check -j3 V=1"
 
 
 git:
@@ -250,6 +250,6 @@ matrix:
 
     - env:
         - CONFIG="--disable-system --disable-docs"
-        - TEST_CMD="make -j3 check-tcg"
+        - TEST_CMD="make -j3 check-tcg V=1"
       dist: trusty
       compiler: gcc