tests/vm: Pass the jobs parallelism setting to 'make check'

Our test suite works for parallel execution too, and this can
noticeably speed up a test run; pass the 'jobs' setting to
it as well as to the build proper.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Message-Id: <20180803085230.30574-3-peter.maydell@linaro.org>
Signed-off-by: NFam Zheng <famz@redhat.com>

tests/vm/freebsd

@@ -24,7 +24,7 @@ class FreeBSDVM(basevm.BaseVM):
         tar -xf /dev/vtbd1;
         ./configure {configure_opts};
         gmake -j{jobs};
-        gmake check;
+        gmake -j{jobs} check;
     """
 
     def build_image(self, img):

tests/vm/netbsd

@@ -24,7 +24,7 @@ class NetBSDVM(basevm.BaseVM):
         tar -xf /dev/rld1a;
         ./configure --python=python2.7 {configure_opts};
         gmake -j{jobs};
-        gmake check;
+        gmake -j{jobs} check;
     """
 
     def build_image(self, img):

tests/vm/openbsd

@@ -25,7 +25,7 @@ class OpenBSDVM(basevm.BaseVM):
         ./configure --cc=x86_64-unknown-openbsd6.1-gcc-4.9.4 --python=python2.7 {configure_opts};
         gmake -j{jobs};
         # XXX: "gmake check" seems to always hang or fail
-        #gmake check;
+        #gmake -j{jobs} check;
     """
 
     def build_image(self, img):

tests/vm/ubuntu.i386

@@ -26,7 +26,7 @@ class UbuntuX86VM(basevm.BaseVM):
         tar -xf /dev/vdb;
         ./configure {configure_opts};
         make -j{jobs};
-        make check;
+        make -j{jobs} check;
     """
 
     def _gen_cloud_init_iso(self):