py/compile: Fix handling of yield in lambda.
py/compile: Fix handling of yield in lambda.

yield's result should be returned from lambda, contrary to upstream code.

Change-Id: I3d207b7e93969b396c446d5d78d8186a69fcd9fe
Signed-off-by: Paul Sokolovsky <9dc5061f178bb11813e14f1ed02ba27eaf21fa5d@users.sourceforge.net>

pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython