classes: add classes for uuu bundle generation

[dwagenk]

NOTE This is meant for discussion. This implementation evolved over the past few years and I've used it in multiple projects. The image_populate_mfgtool class did not exist when I first used this class. Are you interested in integrating this into meta-freescale?

The uuu_bundle.bbclass can be used to create uuu zip files containing arbitrary files collected from DEPLOY_DIR_IMAGE and a uuu.auto script. A user provided uuu.auto.in script is processed to replace file placeholders and text placeholders.

The uuu_image_bundle.bbclass does the same for image recipes when inheriting the class and specifying a basetype with uuu-zip extension in IMAGE_FSTYPE, e.g. ext4.gz.uuu-zip. This can be done for multiple basetypes, so the same image recipe can provide different uuu-bundles, e.g. for booting the image from ramdisk for test purposes or flashing it to internal storage.

The provided classes differ from the image_populate_mfgtool.bbclass by:

• not being limited to image recipes
• allowing creation of uuu bundles for multiple types from IMAGE_FSTYPES
• not bundling the uuu binaries
• creating a name.uuu.zip file that can be directly used with the uuu tool, e.g. uuu path/to/name.uuu.zip
• more flexible variable replacement, e.g. not assuming UBOOT_BINARY is used as bootloader in uuu.auto script
• properly integrating with the Openembedded deploy and image deploy mechanisms
• different semantics