lk/openssl: Adding openssl to compile in lk build

This is used for verifying signed kernel.
Openssl library will be used for certificate parsing
and rsa decryption.

Change-Id: Icf0024afd8f4d8690d077b47f4b9e83cad1e4813
diff --git a/include/malloc.h b/include/malloc.h
index d48f6d2..dc34742 100644
--- a/include/malloc.h
+++ b/include/malloc.h
@@ -34,6 +34,7 @@
 void *memalign(size_t boundary, size_t size) __MALLOC;
 void *calloc(size_t count, size_t size) __MALLOC;
 void free(void *ptr);
+void *realloc(void *ptr, size_t size);
 
 #if defined(__cplusplus)
 }