utils.bbclass: Testing via env in create_wrapper is a nice idea but breaks things

utils.bbclass: Testing via env in create_wrapper is a nice idea but breaks things

For example, pseudo-native wants to set LD_LIBRBARY_PATH but setting this
into the environment here causes the existing pseudo (running during do_install)
to poke into paths in /opt and this breaks builds.

The simplest fix is simply not to do this. Comments tweaks to match the code.

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