'make check' should return with non-zero status

... if the test fails.

--- zlib-1.2.11/Makefile.in.orig	2017-02-11 12:00:37.768094420 -0800
+++ zlib-1.2.11/Makefile.in	2017-02-11 12:01:02.088399001 -0800
@@ -91,7 +91,7 @@
 	  echo '		*** zlib test OK ***'; \
 	else \
 	  echo '		*** zlib test FAILED ***'; false; \
-	fi; \
+	fi
 	rm -f $$TMPST
 
 testshared: shared
@@ -104,7 +104,7 @@
 	  echo '		*** zlib shared test OK ***'; \
 	else \
 	  echo '		*** zlib shared test FAILED ***'; false; \
-	fi; \
+	fi
 	rm -f $$TMPSH
 
 test64: all64
@@ -113,7 +113,7 @@
 	  echo '		*** zlib 64-bit test OK ***'; \
 	else \
 	  echo '		*** zlib 64-bit test FAILED ***'; false; \
-	fi; \
+	fi
 	rm -f $$TMP64
 
 infcover.o: $(SRCDIR)test/infcover.c $(SRCDIR)zlib.h zconf.h