linux-yocto-rt, core-image-rt*: Explicitly skip when PREFERRED_PROVIDER_virtual/kernel isn't set to linux-yocto-rt
* just like linux-yocto-dev is doing
* fixes following errors in world builds:
ERROR: Nothing PROVIDES 'linux-yocto-rt' (but /home/jenkins/oe/world/shr-core/openembedded-core/meta/recipes-rt/images/core-image-rt-sdk.bb DEPENDS on or otherwise requires it)
ERROR: linux-yocto-rt was skipped: PREFERRED_PROVIDER_virtual/kernel set to linux-yocto, not linux-yocto-rt
ERROR: linux-yocto-rt was skipped: PREFERRED_PROVIDER_virtual/kernel set to linux-yocto, not linux-yocto-rt
ERROR: Required build target 'core-image-rt-sdk' has no buildable providers.
Missing or unbuildable dependency chain was: ['core-image-rt-sdk', 'linux-yocto-rt']
ERROR: Nothing PROVIDES 'linux-yocto-rt' (but /home/jenkins/oe/world/shr-core/openembedded-core/meta/recipes-rt/images/core-image-rt.bb DEPENDS on or otherwise requires it)
ERROR: linux-yocto-rt was skipped: PREFERRED_PROVIDER_virtual/kernel set to linux-yocto, not linux-yocto-rt
ERROR: linux-yocto-rt was skipped: PREFERRED_PROVIDER_virtual/kernel set to linux-yocto, not linux-yocto-rt
ERROR: Required build target 'core-image-rt' has no buildable providers.
Missing or unbuildable dependency chain was: ['core-image-rt', 'linux-yocto-rt']
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
