Refactor code from test/ to utils/ since they are not just used by tests.

src/platform/vboot_reference/tests/Makefile

Index: src/platform/vboot_reference/tests/Makefile
diff --git a/src/platform/vboot_reference/tests/Makefile b/src/platform/vboot_reference/tests/Makefile
index ba50eccbd93d5eeb968d1f601ae1887eac78486a..ba4c4a64f22df46b2a8f7c3b66a76500693a596b 100644
--- a/src/platform/vboot_reference/tests/Makefile
+++ b/src/platform/vboot_reference/tests/Makefile
@@ -2,19 +2,14 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-SRCS=sha_tests.c verify_data.c signature_digest.c
+SRCS=sha_tests.c
 OBJS=$(SRCS:.c=.o)
 LIBS=$(TOP)/crypto/libcrypto.a $(TOP)/common/libcommon.a
 
-tests:	sha_tests verify_data signature_digest
+tests:	sha_tests
 
-sha_tests:	sha_tests.c
+sha_tests: sha_tests.c
 	$(CC) $(CFLAGS) -DNDEBUG $(INCLUDES) $< -o $@ $(LIBS)
 
-verify_data:	verify_data.c digest_utility.o
-	$(CC) $(CFLAGS) -DNDEBUG $(INCLUDES) $< -o $@ $(LIBS)
-
-signature_digest:	signature_digest.c
-	$(CC) $(CFLAGS) -DNDEBUG $(INCLUDES) $< -o $@ $(LIBS)
 clean:
 	rm -f $(OBJS) sha_tests verify_data signature_digest