valgrind: Skip vgpreload_memcheck shared object from stripping
This is a special library for memcheck tool, where it needs to have the
symbols intact for the stack traces to work on target, current option is
to install valgrind-dbg ( 151 MB uncompressed ) is quite big for some
systems which may not have space to install it all. Leaving it
unstripped adds about 200KB to image which is much better, this alone
gets memcheck working, as an aside we might need same solution for other
tools e.g. helgrind etc. when needed, they also have leading libraries
installed
Signed-off-by: Khem Raj <raj.khem@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
