[Bug target/126012] [powerpc64le] Support IEEE-128 long double on FreeBSD (config.gcc / configure / libgcc float128)

[pkubaj at anongoth dot pl via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126012

--- Comment #2 from Piotr Kubaj <pkubaj at anongoth dot pl> ---
Sent a new revision that fixes some issues when using along with clang.