Squash commits for public release

libs/libc/stdlib/exit.c

@@ -0,0 +1,15 @@
+#include <signal.h>
+#include <stdlib.h>
+#include <sysdep.h>
+
+void exit(int status)
+{
+    DO_SYSCALL_1(SYS_EXIT, status);
+    __builtin_unreachable();
+}
+
+void abort()
+{
+    raise(SIGABRT);
+    exit(127);
+}