Move creation of last section id from ld linker script LONG() usage to
C code with last section attribute.
The use of `LONG()` works correctly with ld but lld emits a warning
because .last_section section is not allocated as there are no matching
input sections and discards the `LONG()` call, meaning the last section
identifier will not be present in the flash.
> ld.lld: warning: ignoring memory region assignment for
> non-allocatable section '.last_section'
Placing the last section id in `.last_section` in C code makes lld
allocate the memory for the id and thereby create the output section
with the correct output.
Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
Move various utilities out of lib into own folder for better assignement
and management in the maintainer file. lib/os has become another dumping
ground for everything and it the Kconfig and contents in that folder
became difficult to manage, configure and test.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
