travis: stop redefining the script commands

One of the matrix entries redefines the script command in order to add
the ${MAKEFLAGS} variable. Ideally ${MAKEFLAGS} would be referenced by
the definition of the ${TEST_CMD} env variable, but this isn't possible
in travis. ${MAKEFLAGS} exists to eliminate duplication of flags in
every "make" command, but this cure causes a worse problem, namely the
reduplication of the "script" command. It is simpler to just insert "-j3"
directly into any "make" command.

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

.travis.yml

@@ -65,8 +65,7 @@ env:
   global:
     - SRC_DIR="."
     - BUILD_DIR="."
-    - TEST_CMD="make check"
-    - MAKEFLAGS="-j3"
+    - TEST_CMD="make check -j3"
 
 
 git:
@@ -78,7 +77,7 @@ before_script:
   - mkdir -p ${BUILD_DIR} && cd ${BUILD_DIR}
   - ${SRC_DIR}/configure ${CONFIG} || { cat config.log && exit 1; }
 script:
-  - make ${MAKEFLAGS} && ${TEST_CMD}
+  - make -j3 && ${TEST_CMD}
 
 
 matrix:
@@ -255,9 +254,7 @@ matrix:
 
     - env:
         - CONFIG="--disable-system --disable-docs"
-        - TEST_CMD="make check-tcg"
-      script:
-        - make ${MAKEFLAGS} && ${TEST_CMD} ${MAKEFLAGS}
+        - TEST_CMD="make -j3 check-tcg"
       sudo: required
       dist: trusty
       compiler: gcc