Vboot Reference: Add functions to verify signed kernel images.

src/platform/vboot_reference/tests/firmware_image_tests.c

Index: src/platform/vboot_reference/tests/firmware_image_tests.c
diff --git a/src/platform/vboot_reference/tests/firmware_image_tests.c b/src/platform/vboot_reference/tests/firmware_image_tests.c
index 11eb4760bbe69db344693cdd414ccaa840c36a36..ff7b509cd56b32d5fbe77f21a82a8af8a568c25e 100644
--- a/src/platform/vboot_reference/tests/firmware_image_tests.c
+++ b/src/platform/vboot_reference/tests/firmware_image_tests.c
@@ -14,13 +14,18 @@
 #include "sha_utility.h"
 #include "utility.h"
 
+/* ANSI Color coding sequences. */
+#define COL_GREEN "\e[1;32m"
+#define COL_RED "\e[0;31m]"
+#define COL_STOP "\e[m"
+
 int TEST_EQ(int result, int expected_result, char* testname) {
   if (result == expected_result) {
-    fprintf(stderr, "%s Test \e[1;32mSUCCEEDED\e[m\n", testname);
+    fprintf(stderr, "%s Test " COL_GREEN " PASSED\n" COL_STOP, testname);
     return 1;
   }
   else {
-    fprintf(stderr, "%s Test \e[0;31mFAILED\e[m\n", testname);
+    fprintf(stderr, "%s Test " COL_RED " FAILED\n" COL_STOP, testname);
     return 0;
   }
 }