Rewrite and hide longjmperror.

This shouldn't be public API, isn't supported on x86/x86_64, and it's
unlikely anyone would have actually seen the message before anyway.
Using __libc_fatal makes it much more likely to be seen.

Bug: 11156955
Change-Id: Icf7f654b22a7dacd89668b60c11e5705c7215c08
4 files changed