[Bug bootstrap/87741] Don't build readline/libreadline.a in GDB, when --with-system-readline is supplied

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87741

--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
https://sourceware.org/git/?p=binutils-gdb.git;a=commit;f=configure.ac;h=69961a84c9b3744a10248fb6cbccc3c688a1e0a5

It would be useful if both configures were synced up again ....