bash: Import from oldpackages, update to 4.2.48

Fixes CVE-2014-6271.

This is pretty much the same update I pushed to trunk yesterday, just for bash 4.2. As I've taken maintainership after the branch, BB's bash is still in oldpackages currently.

Please note that this does *not* fix CVE-2014-7169, there is no official patch for that one yet. I originally wanted to hold the update back until that one gets solved too, but apparently CVE-2014-7169 isn't that much of a threat in real-world applications(for now, that is). I'll update the package as soon as there is a working fix of course.