Now that gcc-cross, gcc-crosssdk and others have expanded variables in
their names, the code that previous just applied to cross-canadian needs
expanding to cover the other cases. Improve the conditional and also
fix a bug where the multilib prefix wasn't being added into the generated
versions.
(From OE-Core rev: d2b18d7692229d4b87b38becf173b1f8b6e90025)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>