[multiarch,release] Support Debian oldstable's gcc-4.4

Unfortunately gcc-4.4 does not support --print-multiarch.
Therefore we fallback to cc -v and grep for the target in this case.
(cherry picked from commit 234ba11888407bd42ddbfaa7e78a894acf3c8e4c)

Signed-off-by: Markus Blatt <markus@dr-blatt.de>