debian/rules: honor 'nocheck' flag in DEB_BUILD_OPTIONS

porting from debian

Author: sorah

debian/changelog

@@ -1,6 +1,8 @@
 ruby2.2 (2.2.6-0nkmi1) unstable; urgency=medium
 
   * new upstream version
+  * honor nocheck flag
+    (porting d7218fd9adb2279c9e4b4f626dfeebaa34830add from debian)
 
  -- Sorah Fukumori <[email protected]>  Tue, 22 Nov 2016 19:19:13 +0000
 

debian/rules

@@ -68,7 +68,9 @@ override_dh_auto_build-arch:
 	dh_auto_build -- main V=1
 
 override_dh_auto_test-arch:
+ifeq (,$(filter nocheck,$(DEB_BUILD_OPTIONS)))
 	$(MAKE) TESTS="-v -j 4" V=1 check
+endif
 
 override_dh_auto_install-arch:
 	$(MAKE) install-nodoc V=1 DESTDIR=$(CURDIR)/debian/tmp