fstab: add firmware_file context to modem partition

Change-Id: Iac01d3d79f6ca7bf63416cef844cddfae8f95b22

rootdir/etc/fstab.g3

@@ -12,7 +12,7 @@
 /dev/block/platform/msm_sdcc.1/by-name/persist      /persist        ext4    nosuid,nodev,barrier=1,data=ordered,nodelalloc,nomblk_io_submit,errors=panic wait
 /dev/block/platform/msm_sdcc.1/by-name/boot         /boot           emmc    defaults                                                        recoveryonly
 /dev/block/platform/msm_sdcc.1/by-name/recovery     /recovery       emmc    defaults                                                        recoveryonly
-/dev/block/platform/msm_sdcc.1/by-name/modem        /firmware       vfat    ro,shortname=lower,uid=1000,gid=1026,dmask=227,fmask=337        wait
+/dev/block/platform/msm_sdcc.1/by-name/modem        /firmware       vfat    ro,shortname=lower,uid=1000,gid=1026,dmask=227,fmask=337,context=u:object_r:firmware_file:s0        wait
 
 /dev/block/platform/msm_sdcc.1/by-name/sns          /sns            ext4    nosuid,nodev,barrier=1,noatime,noauto_da_alloc,errors=continue wait
 /dev/block/platform/msm_sdcc.1/by-name/drm          /persist-lg     ext4    nosuid,nodev,barrier=1,noatime,noauto_da_alloc,errors=continue wait