Support names in system_layout
Allow specifying GPT partition names using block:foo and UBI volume
names with ubi:foo. For the root, this is supported, regardless of
whether UBIFS or UBI block with squashfs is used, i.e. it will get
translated to ubi0:foo or /dev/ubiblock0_4 depending on the filesystem
used.
Strings not matching ^(ubi:|block:) will not be translated, so the old
way of specifying directly what is passed to mount(8) is still working
and thus providing full flexibility.
Edited by Andreas Gnau