webos.inc: Always include webos-enh-sub-autorev-error in ERROR_QA

:Release Notes:
Doing it conditionally on WEBOS_DISTRO_BUILD_ID causes many sstate
signatures to be different between builds with different
WEBOS_DISTRO_BUILD_ID value.

:Detailed Notes:
Instead of overriding global ERROR_QA, use INSANE_SKIP only for recipes
with known and intentional AUTOREV (e.g. from webos-local.conf).

:Testing Performed:
Only build tested.

:QA Notes:
No change to image.

:Issues Addressed:
[ANG-679] QA ERROR regarding use of AUTOINC should only be a warning
          for local developer builds

Open-webOS-DCO-1.0-Signed-off-by: Martin Jansa <martin.jansa@lge.com>

Change-Id: I5815f12e70ce1d1d9c0fc4a09e1d71f0a2eacadd