[PATCH] baremetal-image: Fix post process command rootfs_update_timestamp

When running:

execute_pre_post_process(d, d.getVar(ROOTFS_POSTPROCESS_COMMAND))

rootfs_update_timestamp is run, which assumes that rootfs/${sysconfdir}
is already created (usually done through the do_rootfs task on linux).

This causes the build to fail if ${sysconfdir} does not exist.

This may be overlooked if debug-tweaks is enabled since some other
commands are added, one of which creates the required path
(see postinst_enable_logging).

See [1] for more info:

[1] https://github.com/aehs29/meta-freertos/issues/4

Signed-off-by: Alejandro Enedino Hernandez Samaniego <redacted>
---
 meta/classes/baremetal-image.bbclass | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/meta/classes/baremetal-image.bbclass b/meta/classes/baremetal-image.bbclass
index 319b61c7cd..8708a54301 100644
--- a/meta/classes/baremetal-image.bbclass
+++ b/meta/classes/baremetal-image.bbclass

@@ -50,6 +50,10 @@ python do_rootfs(){
         if os.path.lexists(manifest_link):
             os.remove(manifest_link)
         os.symlink(os.path.basename(manifest_name), manifest_link)
+    # A lot of postprocess commands assume the existence of rootfs/etc
+    sysconfdir = d.getVar("IMAGE_ROOTFS") + d.getVar('sysconfdir')
+    bb.utils.mkdirhier(sysconfdir)
+
     execute_pre_post_process(d, d.getVar('ROOTFS_POSTPROCESS_COMMAND'))
 }
 

-- 
2.25.1