bitbake: bitbake: Switch to using new override syntax

This change updates the datastore to use the new override syntax using
colons instead of underscores exclusively. It is expected layers would
have to be converted to work with bitbake after this change.

Supporting mixed syntax isn't possible, it is only feasible to have
one internal representation of overrides.

Whilst we can't warn for every possible override that may be set in the
old format, show errors for _append/_prepend/_remove since those should
never be present.

(Bitbake rev: 7dcf317cc141dc980634f8c18bfa84f83e57206a)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/parse/ast.py

@@ -97,7 +97,6 @@ class DataNode(AstNode):
     def eval(self, data):
         groupd = self.groupd
         key = groupd["var"]
-        key = key.replace(":", "_")
         loginfo = {
             'variable': key,
             'file': self.filename,
@@ -208,7 +207,6 @@ class ExportFuncsNode(AstNode):
     def eval(self, data):
 
         for func in self.n:
-            func = func.replace(":", "_")
             calledfunc = self.classname + "_" + func
 
             if data.getVar(func, False) and not data.getVarFlag(func, 'export_func', False):