lib/oe/classextend.py: avoid extending any kernel package

For multilib and other uses of classextend, we don't want any
dependencies on kernel packages to be extended since there should only
be one kernel variant.

Fixes [YOCTO #2918] (where kernel-dev was being extended.)

(From OE-Core rev: 26dc1d726387c76adbfb9df19c18daee10ab636c)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oe/classextend.py

@@ -5,7 +5,7 @@ class ClassExtender(object):
         self.pkgs_mapping = []
 
     def extend_name(self, name):
-        if name.startswith("kernel-module") or name == "virtual/kernel":
+        if name.startswith("kernel-") or name == "virtual/kernel":
             return name
         if name.startswith("rtld"):
             return name