sysutils/filewatcherd: Update to 1.0

Fix build on arm/arm64:

Don't use char to store the return value of getopt_long, use int instead.

ChangeLog: https://github.com/faelys/filewatcherd/releases/tag/1.0
See also: https://github.com/faelys/filewatcherd/issues/5
PR: 268793
MFH: 2023Q1 (build fixes)

(cherry picked from commit 7124540f1aed5cbb68480ed79a1149c368dcd0fb)