The inclusion of STAGING_DIR/BASE_WORKDIR in PATH is contaminating
the environment, i.e. when try to sanity check perl (check_perl_modules)
it takes perl from STAGING_DIR causing eSDK install to fail.
(From OE-Core rev: 32611395e1da21f6f7f7916fb8077e35ee81bb23)
Signed-off-by: Aníbal Limón <anibal.limon@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>