Vboot Reference: Misc style fixes to Makefile and fix testing script.

Review URL: http://codereview.chromium.org/600114
diff --git a/Makefile b/Makefile
index 55f4803..96798fd 100644
--- a/Makefile
+++ b/Makefile
@@ -2,11 +2,11 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-export CC=gcc
-export CFLAGS=-Wall -ansi
-export TOP=$(shell pwd)
-export INCLUDEDIR=$(TOP)/include
-export INCLUDES=-I$(INCLUDEDIR)
+export CC = gcc
+export CFLAGS = -Wall -ansi -DNDEBUG
+export TOP = $(shell pwd)
+export INCLUDEDIR = $(TOP)/include
+export INCLUDES = -I$(INCLUDEDIR)
 
 SUBDIRS=common crypto utils tests