Disable GL scissor optimization for crespo (SGX540)
system.prop: set ro.bq.gpu_to_cpu_unsupported for aries
Provide libskia_legacy for compatibility with browser saved pages from Android 4.2 and earlier
BoardConfigCommon: update CPU feature settings for Android 4.3
Update media_codecs.xml for 4.3

* Add GSM decoder explicity
* Add VPX encoder (now required for 4.3 compatibility)
Remove make_ext4fs from PRODUCT_PACKAGES

This has been in the core package set since 4.2.