[klibc] sh4: switch to RT signals

tested on sumotsu.debian.net (Debian non-DSA porterbox)
note: this unbreaks the build and fixes a regression, but any
klibc executable (static or shared) still throws SIGILL on sh4

Signed-off-by: Thorsten Glaser <tg@mirbsd.org>
Signed-off-by: maximilian attems <max@stro.at>
1 file changed