msm7x30: Disable block based OTAs

Wouldn’t want to brick anything. Source:
https://github.com/LegacyXperia/android_device_semc_msm7x30-common/commi
t/6a9dfdd14c2f8db6331004e3f3da24572cf636e6#diff-581794583e89a660d8f68651
b78d17f9R89
msm7x30: HACK: Allow non-PIE binaries to load

May actually be needed. Source:
https://github.com/LegacyXperia/android_device_semc_msm7x30-common/commi
t/df15a9f26a64c937fc13cf02fe7ffb78860af6bc
Enable dex-preoptimization to speed up first ...

…boot sequence
Used by both Ivanich and LX, reference:
https://github.com/LegacyXperia/android_device_semc_msm7x30-common/commi
t/134a1c6e538dee66bf593201d94470b733d90cbd