move setgroups definition to libbb.h so that it no longer inadvertently

get hidden attribute

include/grp_.h

@@ -36,11 +36,6 @@ struct group {
 	char **gr_mem;          /* Member list. */
 };
 
-/* We don't reimplement this, just supplying prototype */
-/* The function itself is in libc */
-/* Set the group set for the current user to GROUPS (N of them).  */
-extern int setgroups(size_t __n, __const gid_t *__groups);
-
 
 #define setgrent     bb_internal_setgrent
 #define endgrent     bb_internal_endgrent

include/libbb.h

@@ -79,9 +79,11 @@
 # endif
 #endif
 
-/* Some libc's forget to declare these, help them */
+/* Some libc's forget to declare these, do it ourself */
 extern char **environ;
 
+/* Set the group set for the current user to GROUPS (N of them).  */
+int setgroups(size_t n, const gid_t *groups);
 #if defined(__GLIBC__) && __GLIBC__ < 2
 int vdprintf(int d, const char *format, va_list ap);
 #endif