optimization/5415: [hp-ux] -O2 crash in redirect_edge_and_branch

[Giovanni Bajo]

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5415

As for other similar PRs, the only way to go is to reproduce the bug with an
older compiler, trim down the preprocessed source to a bare minimum and
eventually try again with mainline. Until we can properly check with
mainline, it's a bit risky to close the PR.

Giovanni Bajo