scripts/addToolVersion: fix gcc complibs dependency

Since the gcc configuration changes, the way to select the
dependent companion libraries has changed.

Update the addToolVersion script to match.

Reported-by: Xun Li <lxfind@gmail.com>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
(transplanted from 4cd9cda2265c0c76df3d4ff77a2f3461aae3bc9f)

 reporter_name="Remy Bohmer"

 reporter_url="linux@bohmer.net"

 reporter_comment="Example for building a toolchain for m68000 bare metal targets"