Add implementation for the murmur3 x64_128 hash

src/common/misc/misc_utils.h

@@ -50,6 +50,10 @@ BEGIN_C_LINKAGE
 #define wpMiscUtilsIsPowerOfTwo(NUM) ((NUM & (NUM - 1)) == 0)
 #define wpMiscUtilsOffsetPointer(PTR, OFFSET) ((void *)((uptr)(PTR) + (OFFSET)))
 
+wp_intern inline u64 wpMiscUtilsRotl64(u64 x, i8 rotation) {
+  return (x << rotation) | (x >> (64 - rotation));
+}
+
 #ifdef WP_PLATFORM_CPP
 END_C_LINKAGE