Squash commits for public release

test/kernel/signal/signalself/BUILD.gn

@@ -0,0 +1,8 @@
+import("//build/test/TEMPLATE.gni")
+
+xOS_test("signalself") {
+  test_bundle = "kernel/signal/signalself"
+  sources = [ "main.c" ]
+  configs = [ "//build/userland:userland_flags" ]
+  deplibs = [ "libc" ]
+}

test/kernel/signal/signalself/main.c

@@ -0,0 +1,18 @@
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+int ret = 1;
+
+void save_on_terminate()
+{
+    ret = 0;
+}
+
+int main(int argc, char** argv)
+{
+    sigaction(SIGTERM, save_on_terminate);
+    raise(SIGTERM);
+    return ret;
+}