amazon omap4-common: add selinux_defconfig

Change-Id: I1180205dcd669d1d42e6c8fa0f0aaf2aa972f27b
domx: add nBitsPerSample to FLAC

needed by updates to libstagefright

Change-Id: I4f8bb3cc1d3410472cbfa14cc4d91445b4da97f3