#12 Remove AC_CANONICAL_SYSTEM call

[Diego Elio Pettenò]

Not a patch per se, but it can be replicated by "sed -i -e /AC_CANONICAL_SYSTEM/d configure.ac" on the source repository.

The AC_CANONICAL_SYSTEM macro defines the $host and $target variables, the configure use neither, the macros using them, like libtool's, already take care of requiring the expansion of these macros beforehand.

Also, in general the AC_CANONICAL_SYSTEM macro should not be used for most software, see http://blog.flameeyes.eu/s/canonical-target for a complete explanation.

HTH,
Diego