debian: Be verbose on make check errors by printing the test suite log

debian/changelog

@@ -94,6 +94,7 @@ dpkg (1.17.7) UNRELEASED; urgency=low
   * Add Conflicts to dpkg against packages using install-info that were
     removed after lenny or squeeze, but may have survived upgrades to wheezy.
     Thanks to Andreas Beckmann <anbe@debian.org>. Closes: #735159
+  * Be verbose on «make check» errors by printing the test suite log.
 
   [ Updated dpkg translations ]
   * German (Sven Joachim).

debian/rules

@@ -66,7 +66,7 @@ check: build
 	dh_testdir
 
 ifeq (,$(filter nocheck,$(DEB_BUILD_OPTIONS)))
-	cd build-tree && $(MAKE) check
+	cd build-tree && $(MAKE) VERBOSE=1 check
 endif
 
 # Install the package underneath debian/tmp