fix some restrict-qualifier mismatches in newly added interfaces

these should have little/no practical impact but they're needed for
strict conformance.

include/spawn.h

@@ -57,8 +57,8 @@ int posix_spawnattr_getsigdefault(const posix_spawnattr_t *__restrict, sigset_t
 
 int posix_spawnattr_setschedparam(posix_spawnattr_t *__restrict, const struct sched_param *__restrict);
 int posix_spawnattr_getschedparam(const posix_spawnattr_t *__restrict, struct sched_param *__restrict);
-int posix_spawnattr_setschedpolicy(posix_spawnattr_t *__restrict, int);
-int posix_spawnattr_getschedpolicy(const posix_spawnattr_t *__restrict, int *);
+int posix_spawnattr_setschedpolicy(posix_spawnattr_t *, int);
+int posix_spawnattr_getschedpolicy(const posix_spawnattr_t *__restrict, int *__restrict);
 
 int posix_spawn_file_actions_init(posix_spawn_file_actions_t *);
 int posix_spawn_file_actions_destroy(posix_spawn_file_actions_t *);

src/thread/pthread_attr_get.c

@@ -11,7 +11,7 @@ int pthread_attr_getguardsize(const pthread_attr_t *restrict a, size_t *restrict
 	return 0;
 }
 
-int pthread_attr_getinheritsched(const pthread_attr_t *a, int *inherit)
+int pthread_attr_getinheritsched(const pthread_attr_t *restrict a, int *restrict inherit)
 {
 	*inherit = a->_a_sched;
 	return 0;
@@ -23,7 +23,7 @@ int pthread_attr_getschedparam(const pthread_attr_t *restrict a, struct sched_pa
 	return 0;
 }
 
-int pthread_attr_getschedpolicy(const pthread_attr_t *a, int *policy)
+int pthread_attr_getschedpolicy(const pthread_attr_t *restrict a, int *restrict policy)
 {
 	*policy = a->_a_policy;
 	return 0;