Various parts of the buildsystem have to work with symlinks. Resolving
them is not trivial because they are always relative to a sysroot
directory.
Patch adds a function which returns the destination of a symlink by
assuming a given path as the / toplevel directory. A testsuite was
added too.
(From OE-Core rev: 76e0bd7f8e3a3bd052a6e329f88e2d8099e899c4)
Signed-off-by: Enrico Scholz <enrico.scholz@sigma-chemnitz.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
