Fix devman boot crash when using image scripts

This was caused by a missing line in the generated fstab.

Change-Id: If0590a27706bbb62e53d72f224ccb332e31421f6

releasetools/arm_sdimage.sh

@@ -112,6 +112,7 @@ sh ${BUILDSH} -V SLOPPY_FLIST=yes -j ${JOBS} -m ${ARCH} -O ${OBJ} -D ${DESTDIR}
 cat >${FSTAB} <<END_FSTAB
 /dev/c0d0p2   /home   mfs     rw                      0       2
 /dev/c0d0p3   /usr    mfs     rw                      0       2
+none          /sys    devman  rw,rslabel=devman       0       0
 END_FSTAB
 
 rm -f ${DESTDIR}/SETS.*

releasetools/x86_hdimage.sh

@@ -73,6 +73,7 @@ fi
 cat >${FSTAB} <<END_FSTAB
 /dev/c0d0p2   /usr    mfs     rw                      0       2
 /dev/c0d0p3   /home   mfs     rw                      0       2
+none          /sys    devman  rw,rslabel=devman       0       0
 END_FSTAB
 
 rm -f ${DESTDIR}/SETS.*