Not all our images are able to run the tests. Rather than use features
we can just check for the existence and run-ability of gtester. If the
image has been setup for binfmt_misc it will be able to run anyway.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
 tests/docker/common.rc | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/tests/docker/common.rc b/tests/docker/common.rc
index cfc620d554..6df431eb72 100755
--- a/tests/docker/common.rc
+++ b/tests/docker/common.rc
@@ -47,7 +47,13 @@ check_qemu()
     else
         TEST="$@"
     fi
-    make $MAKEFLAGS $TEST
+
+    if type gtester > /dev/null 2>&1 && \
+           gtester --version > /dev/null 2>&1; then
+        make $MAKEFLAGS $TEST
+    else
+        echo "No working gtester, skipping make $TEST"
+    fi
 }
 
 test_fail()
-- 
2.17.1