Print /proc/cpuinfo before executing testsuite

The testsuite fails on some specific build machines in the OBS
build cluster.  Let's try to figure out which CPU flags they have
to narrow down the cause of this.

Change-Id: Ib23e5bfb3c894206fad62d6cc6151583b1bb75a6
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 1d4fb24..e11092d 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -244,6 +244,7 @@
 TESTSUITE = $(srcdir)/testsuite
 
 check-local: atconfig $(TESTSUITE)
+	cat /proc/cpuinfo
 	$(SHELL) '$(TESTSUITE)' $(TESTSUITEFLAGS)
 
 installcheck-local: atconfig $(TESTSUITE)