self-test and crypto fuzzer), and de-experimentalize it.
wolfssl/wolfcrypt/types.h: add definitions for WOLFSSL_WORD_SIZE_LOG2.
wolfcrypt/src/misc.c: fix xorbuf() to make the XorWords() reachable; also,
refactor integer division and modulus ops as masks and shifts, and add pragma
to suppress linuxkm FORTIFY_SOURCE false positive -Wmaybe-uninitialized.