Patch cve-2014-6271

Patch-ID: bash30-017
Under certain circumstances, bash will execute user code while processing the
environment for exported function definitions.

Change-Id: Iccac7b4ae914354978079783a9fe50b3b38ddad5
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_external_bash into cm-11.0