POSIX shell now supports $((expression)) for arithmetic expression
evaluation. This removes the need for an external command, which may not
be available on the build host.
Change-Id: Ibd1342c723c2320d77c4de5b1620be32086daa56
Reviewed-on: https://review.haiku-os.org/c/haiku/+/9238
Reviewed-by: Adrien Destugues <[email protected]>
Tested-by: Commit checker robot <[email protected]>
PulkoMandy
b31ff5b650