msm8660-common: Remove unused flags and files

Remove all the sorts of BoardConfig flags and Cflags that
are orphaned and not doing anything anymore
Remove also non existing targets or targets set in vendor/ev

[PS2] Bring back camera flags
[PS3] Remove librs_jni

Change-Id: I936dcd1f32ae02470a53855e87ca3184fd19a1db
Signed-off-by: helicopter88 <johnlemon.lol@gmail.com>