image_types_fsl.bbclass: Ensure i.MX23 and i.MX28 image stream are available
The i.MX23 and i.MX28 image stream must be built prior the sdcard
generation. The example of a failure is:
,----
| DEBUG: Executing shell function do_image_sdcard
| 0+0 records in
| 0+0 records out
| 0 bytes (0 B) copied, 1.5848e-05 s, 0.0 kB/s
| dd: failed to open '....rootfs.uboot.mxsboot-sdcard': No such file or directory
| WARNING: exit code 1 from a shell command.
`----
The failure has been found by O.S. Systems autobuilder when running
the regression tests.
Change-Id: I64ecca1160e038e15629516f97e8ade5d645be31 Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
