[Bug target/83946] [7/8 Regression] Safe Indirect Jumps broken on AIX

[dje at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83946

--- Comment #4 from David Edelsohn <dje at gcc dot gnu.org> ---
The rest of rs6000.md uses "$" unconditionally for the same purpose, although
common parts of GCC uses ".".