libgcc_s: add libgcc_s_asneeded.so wrapper for gcc 16HEADmain

GCC 16[0][1] now requires a wrapper lib to handle
`--push-state --as-needed -lgcc_s --pop-state` logic[1]
for `gcc` invocations. `g++` will still unconditionally
use `-lgcc_s`.

This fixes buildworld with gcc16.

[0] https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=8a99fdb70493df1294b53406913e5ea1fc971c13
[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123396

Reviewed by:	jhb
MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D59511

0 files changed, 0 insertions, 0 deletions