size_report was using the environment variables NM and OBJDUMP to find
it's toolchain dependencies. It is not clear how well this will work
on different platforms; OSX, Windows. So we now pass the paths of
these dependencies from the build system to the script.
PS: This ensures that size_report uses the cross-compiler's GNU bin
tool instead of the host GNU bin tools. This is presumably beneficial
as it has been required for other GNU bin tools like GDB.
Signed-off-by: Sebastian Bøe <sebastian.boe@nordicsemi.no>
Anas Nashif