Method operator new

Fleece/API_Impl/FLSlice.cc:116–118

        uint8_t _buf[4];

        static inline void* operator new(size_t basicSize, size_t bufferSize) noexcept {
            return malloc(basicSize - sizeof(sharedBuffer::_buf) + bufferSize);
        }

        static inline void operator delete(void *self) {
            assert_precondition(isHeapAligned(self));