Convert hasher to interface and remove spihash64

src/base/hash/hasher/murmur3.c

@@ -9,6 +9,10 @@
 wp_intern inline void validateMur3HasherData(const WpMur3HasherData *io);
 wp_intern inline u64 fmix64(u64 k);
 
+WpHasher wpX64Mur3Hasher(WpMur3HasherData *data) {
+	return (WpHasher){ .func = wpX64Mur3Hasher128, .data = (void *)data };
+}
+
 WpU128Hash wpX64Mur3Hasher128(WpU8Stream *bytes, void *hasher_io) {
 	WpMur3HasherData *io = (WpMur3HasherData *)hasher_io;
 	validateMur3HasherData(io);