Merging calls to `abort'

[Richard Stallman]

GCC's primary purpose is to be the compiler for the GNU system.  It is
used for many other purposes too, and it is good for GCC to serve more
purposes, but they're not as important for the GNU Project, even
though they are all important for some users.

Meanwhile, assuming that -Os is not implied by -O2, then I agree it is
reasonable to do cross-jumping of `abort' when -Os is specified.