device.mk: inherit omap4.mk for stable build

inherit hardware/ti/omap4xxx/omap4.mk file to add the files like
libOMX.TI.DUCAT1.VIDEO.CAMERA.so to the build

this modification also fixes the following problem on stable build:
https://bugs.launchpad.net/linaro-android/+bug/1033911

Change-Id: I35237db4c7a550827d929c9a1b7ace91eb7417c8
Signed-off-by: Yongqin Liu <yongqin.liu@linaro.org>
1 file changed