spec: Cat test-suite.log if make check fails

Current automake enables parallel test by default, which means test
details are only logged in test-suite.log and not printed to stderr.
This patch makes test failures directly visible in RPM build logs even
when parallel tests are turned on.

libvirt.spec.in

@@ -1482,7 +1482,11 @@ do
   printf '#!/bin/sh\nexit 0\n' > $i
   chmod +x $i
 done
-make check
+if ! make check VIR_TEST_DEBUG=1
+then
+  cat test-suite.log || true
+  exit 1
+fi
 
 %if %{with_libvirtd}
 %pre daemon