fstab: don't hardcode fs type, don't install as recovery.fstab

Use a separate recovery.fstab in msm7x27-common for recovery to
fix sdcard partitioning.

Change-Id: I2aaa1eb29f42c9a3be467a586f7be1060db24a2a
Merge remote-tracking branch 'androidarmv6/cm-11.0' into cm-11.0