Regenerate charmap-kw.h and locfile-kw.h with gperf 3.3

Regenerate charmap-kw.h and locfile-kw.h with gperf 3.3

In commit 970364dac00b38333e5b2d91c90d11e80141d265 we switched some
/*FALLTHROUGH*/ comments to [[fallthrough]] to avoid warnings with
Clang. However, since gperf emitted different output the buildbot
failed. The buildbot has been updated to use gperf 3.3 which will use
__attribute__ ((__fallthrough__)) where needed to avoid warnings [1].
This patch regenerates these files with the same version.

[1] https://sourceware.org/pipermail/libc-testresults/2025q4/014123.html

Reviewed-by: Mark Wielaard <mark@klomp.org>