Using bash is problematic on non-linux plattforms, Matthias use NetBSD.

Using bash is problematic on non-linux plattforms, Matthias use NetBSD.

Original commit message from CVS:
moving GStreamer from Bash to sh. Patch from Matthias Friedrich <matt@mafr.de>
Using bash is problematic on non-linux plattforms, Matthias use NetBSD.

Matthias message:
I appended the promised fix to autogen.sh and friends. That way, only
plain /bin/sh is needed as it is present on all Unices.

The problems were non-portable pushd/popd functions and the usage of a
'==' comparison which is non-standard in test(1). The standard is '=',
although C programmers never believe it.