data: Fix output inconsistencies for emit_var

VAL = ""     (not shown)
VAL = " "    (shown as "")
VAL = " x"   (shown as "x")

would all show up rather differently to what would be expected in the
bitbake -e output. This fixes things so they appear consistently.

The output for running some shell functions may also change slightly
but shouldn't change in a way that is likely to cause problems.

[YOCTO #5507]

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
bitbake: fetch2: Remove the unused urldata from the git fetcher.

Signed-off-by: Florin Sarbu <florin.sarbu@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
fetch2: Correct a few calls to latest_revision()

In 6a48474de9505a3700863f31839a7c53c5e18a8d the url parameter to a
number of functions was removed. However, not all calls to
latest_revision() were fixed...

Signed-off-by: Peter Kjellerstedt <peter.kjellerstedt@axis.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
world-image: add extra target

* similar to world target, but collects all PACKAGES
* recipes marked with EXCLUDE_FROM_WORLD are excluded from world as well
  as world-image
* recipes marked with EXCLUDE_FROM_WORLD_IMAGE are excluded completely
  from world-image, sometimes you can build 2 recipes in same sysroot,
  but cannot install them in the same image
* PACKAGES listed in EXCLUDE_PACKAGES_FROM_WORLD_IMAGE are also
  excluded. You can remove e.g. ${PN}-dbg, but keep all other PACKAGES.

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>