No fail if no /proc/cpuinfo

Change-Id: I4b9e12e34f69d98fa87179c7ee390e31001ec943
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 92edf75..ececf69 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -336,7 +336,7 @@
 TESTSUITE = $(srcdir)/testsuite
 
 check-local: atconfig $(TESTSUITE)
-	cat /proc/cpuinfo
+	[ -e /proc/cpuinfo ] && cat /proc/cpuinfo
 	$(SHELL) '$(TESTSUITE)' $(TESTSUITEFLAGS)
 	$(MAKE) $(AM_MAKEFLAGS) ext-tests