cobalt/posix/syscall32: Mark compat clock_nanosleep restartable

Commit 36132cdb

 forgot to align this with the native syscall.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

kernel/cobalt/posix/syscall32.c

@@ -229,7 +229,7 @@ COBALT_SYSCALL32emu(clock_adjtime64, current,
 }
 
 
-COBALT_SYSCALL32emu(clock_nanosleep, nonrestartable,
+COBALT_SYSCALL32emu(clock_nanosleep, primary,
 		    (clockid_t clock_id, int flags,
 		     const struct old_timespec32 __user *u_rqt,
 		     struct old_timespec32 __user *u_rmt))