x86_64-linux-*:  Fix build with libstdc++-V3 on linux targets (1/2)

See https://github.com/SaberMod/sabermod-toolchain-build/pull/2

Signed-off-by: Paul Beeler <pbeeler80@gmail.com>
Merge pull request #5 from SaberMod/patch

x86_64-linux-*:  Fix build with libstdc++-V3 on linux targets