bitbake: data_smart: Allow numeric characters in overrides

We're seeing problems due to the way x86-64 is handled (or not handled)
as an override. Relax the containts on overrides from being lowercase
to being lowercase or numeric. This fixes problem where MACHINE=qemux86
would work but MACHINE=qemux86-64 would fail the same tests.

(Bitbake rev: 3a3be518536acc868c7eeb3c1111ad1b321480b7)

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

bitbake/lib/bb/data_smart.py

@@ -43,6 +43,7 @@ __setvar_regexp__ = re.compile(r'(?P<base>.*?)(?P<keyword>_append|_prepend|_remo
 __expand_var_regexp__ = re.compile(r"\${[^{}@\n\t :]+}")
 __expand_python_regexp__ = re.compile(r"\${@.+?}")
 __whitespace_split__ = re.compile(r'(\s)')
+__override_regexp__ = re.compile(r'[a-z0-9]+')
 
 def infer_caller_details(loginfo, parent = False, varval = True):
     """Save the caller the trouble of specifying everything."""
@@ -597,7 +598,7 @@ class DataSmart(MutableMapping):
         # aka pay the cookie monster
         override = var[var.rfind('_')+1:]
         shortvar = var[:var.rfind('_')]
-        while override and override.islower():
+        while override and __override_regexp__.match(override):
             if shortvar not in self.overridedata:
                 self.overridedata[shortvar] = []
             if [var, override] not in self.overridedata[shortvar]: