Add rule to support verified boot.

Enable verified boot code in LK.

Change-Id: I07362da0018a7f55137c06d9e6e603a0911dc26a
diff --git a/platform/msm_shared/rules.mk b/platform/msm_shared/rules.mk
index 834e883..f0e453c 100755
--- a/platform/msm_shared/rules.mk
+++ b/platform/msm_shared/rules.mk
@@ -38,7 +38,7 @@
 	$(LOCAL_DIR)/mmc.o
 endif
 
-ifeq ($(ENABLE_VERIFIED_BOOT),1)
+ifeq ($(VERIFIED_BOOT),1)
 OBJS += \
 	$(LOCAL_DIR)/boot_verifier.o
 endif