Update build-gnu.sh

Author: ChrisDryden

util/build-gnu.sh

@@ -5,7 +5,7 @@
 # spell-checker:ignore (paths) abmon deref discrim eacces getlimits getopt ginstall inacc infloop inotify reflink ; (misc) INT_OFLOW OFLOW
 # spell-checker:ignore baddecode submodules xstrtol distros ; (vars/env) SRCDIR vdir rcexp xpart dired OSTYPE ; (utils) greadlink gsed multihardlink texinfo CARGOFLAGS
 # spell-checker:ignore openat TOCTOU CFLAGS tmpfs gnproc
-# spell-checker:ignore hfsplus casefold chattr dirp
+# spell-checker:ignore hfsplus casefold chattr dirp memcpy
 
 set -e