secp256k1-sys: update patchfiles for upcoming libsecp v0.4.0 update

Update the `util.h.patch` file in preparation for running the vendor
script. Done by guess work.

secp256k1-sys/depend/util.h.patch

@@ -1,4 +1,4 @@
-134,149d133
+147,154d146
 < static SECP256K1_INLINE void *checked_malloc(const secp256k1_callback* cb, size_t size) {
 <     void *ret = malloc(size);
 <     if (ret == NULL) {
@@ -7,11 +7,3 @@
 <     return ret;
 < }
 < 
-< static SECP256K1_INLINE void *checked_realloc(const secp256k1_callback* cb, void *ptr, size_t size) {
-<     void *ret = realloc(ptr, size);
-<     if (ret == NULL) {
-<         secp256k1_callback_call(cb, "Out of memory");
-<     }
-<     return ret;
-< }
-<