LTO: consistently accept -fwhopr* and -flto* for GCC.

* libltdl/config/ltmain.m4sh (func_mode_link): Accept -fwhopr*.
* libltdl/m4/libtool.m4 (_LT_SYS_HIDDEN_LIBDEPS): Also match
-flto*.

Signed-off-by: Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
3 files changed