pseudo: Ensure the correct libraries are used at runtime

pseudo: Ensure the correct libraries are used at runtime

There can be a conflict between the nativesdk libc and the host system's
libc. It is assumed the nativesdk version is of an equal or higher version.
This is a particular issue for pseudo if its loading a system binary
since the system's libc might be used of an older verison which would
then confuse libpseudo.so when loaded as a preload.

To avoid this, set LD_LIBRARY_PATH so the nativesdk libc is always
used.

Since we now use --without-rpath, we can remove the MAKEOPTS RPATH workaround.

[YOCTO #2299]

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>