Remove unused file.
Fix bluetooth mac and mass storage.
Add i_skt (SU640) support.
Only write files if they don't exist, and rearrange code for clarity.
Cleanup and unify build scripts.

 * iproj now supplies nearly all config files and post-boots scripts.
 * Tweak init.qcom.mdm_links.sh to be independent of partition layout.
 * Tweak init.qcom.modem_links.sh to be independent of partition layout.
 * Set baseband in init.qcom.mdm_links.sh, not init.qcom.post_boot.sh.
 * Do not set ro.sf.lcd_density in init.qcom.sh.