jem: update recovery settings / files

Change-Id: Ifce288e51c84fa3cc93f4de0c96ca391a1e48a61
jem: remove dalvik settings (moved to bowser-common)

Change-Id: Ia69153cdfbba8409e18ff8ace89ebb606e780071
jem: remove common properties (now set in bowser-common)

Change-Id: I93bda15d7a0e4b78f6d0b180320116b1f84522bb
jem: enable CUSTOM_BOOTIMG board flag

Change-Id: Iddc5ab4f7523fd235a797878418a976573c24bb9
jem: update kernel defconfigs and cmdline

Change-Id: Ibe2209fc7dcb1792931edb6e9fc6719e8e83ccf5
jem: ramdisk changes

- fstab cleanup
- use common omap4 and bowser-common init.*.rc files
- cleanup usb settings

Change-Id: Ie6cf7220eaff576f8e90f43f26f1aca855080ed8