Update.

* elf/Makefile: Add rules to build and run initfirst test.
	* elf/initfirst.c: New file.
	* elf/firstobj.c: New file.

elf/firstobj.c

@@ -0,0 +1,8 @@
+#include <errno.h>
+
+int
+foo (void)
+{
+  errno = 0;
+  return 0;
+}