Make sure that our version of certain utility function implementations gets used in the firmware.

firmware/stub/utility_stub.c

Index: firmware/stub/utility_stub.c
diff --git a/firmware/stub/utility_stub.c b/firmware/stub/utility_stub.c
index ed58e0b24c260097741d5ce34ff767a3fd35c7e6..61417856985b5d5c85a2fa1a5ed5251e2dbd2d9b 100644
--- a/firmware/stub/utility_stub.c
+++ b/firmware/stub/utility_stub.c
@@ -51,27 +51,3 @@ int Memcmp(const void* src1, const void* src2, size_t n) {
 void* Memcpy(void* dest, const void* src, uint64_t n) {
   return memcpy(dest, src, (size_t)n);
 }
-
-void* Memset(void* d, const uint8_t c, uint64_t n) {
-  uint8_t* dest = d; /* the only way to keep both cl and gcc happy */
-  while (n--) {
-    *dest++ = c;
-  }
-  return dest;
-}
-
-
-int SafeMemcmp(const void* s1, const void* s2, size_t n) {
-  int result = 0;
-  if (0 == n)
-    return 1;
-
-  const unsigned char* us1 = s1;
-  const unsigned char* us2 = s2;
-  /* Code snippet without data-dependent branch due to
-   * Nate Lawson (nate@root.org) of Root Labs. */
-  while (n--)
-    result |= *us1++ ^ *us2++;
-
-  return result != 0;
-}