[OE-core] INHERIT += "image-buildinfo" doesn't parse

[Trevor Woerner]

Any config with
	INHERIT += "image-buildinfo"
doesn't parse on master (updated moments ago):

	ERROR: Error in compiling python function in /z/layerindex-master/layers/meta-poky/meta/classes/image-buildinfo.bbclass, line 27:

	The code lines resulting in this error were:
	SyntaxError: invalid syntax (image-buildinfo.bbclass, line 35)
	ERROR: Error parsing configuration files
	Traceback (most recent call last):
	  File "/z/layerindex-master/layers/meta-poky/bitbake/lib/bb/parse/parse_py/BBHandler.py", line 145, in handle(fn='/z/layerindex-master/layers/meta-poky/meta/classes/image-buildinfo.bbclass', d=<bb.data_smart.DataSmart object at 0x7fb5df5367f0>, include=True):
		 try:
	    >        statements.eval(d)
		 except bb.parse.SkipRecipe:
	  File "/z/layerindex-master/layers/meta-poky/bitbake/lib/bb/parse/ast.py", line 38, in StatementGroup.eval(data=<bb.data_smart.DataSmart object at 0x7fb5df5367f0>):
		     for statement in self:
	    >            statement.eval(data)
	     
	  File "/z/layerindex-master/layers/meta-poky/bitbake/lib/bb/parse/ast.py", line 187, in PythonMethodNode.eval(data=<bb.data_smart.DataSmart object at 0x7fb5df5367f0>):
		     text = '\n'.join(self.body)
	    >        bb.methodpool.insert_method(self.modulename, text, self.filename, self.lineno - len(self.body) - 1)
		     data.setVarFlag(self.function, "func", 1)
	  File "/z/layerindex-master/layers/meta-poky/bitbake/lib/bb/methodpool.py", line 27, in insert_method(modulename='image-buildinfo.bbclass', code='def get_layer_git_status(path):\n    import subprocess\n    try:\n        subprocess.check_output("cd %s; PSEUDO_UNLOAD=1 git diff --quiet --no-ext-diff" % path,\n                                shell=True,\n                                stderr=subprocess.STDOUT)\n        return ""\n    except subprocess.CalledProcessError, ex:\n        # Silently treat errors as "modified", without checking for the\n        # (expected) return code 1 in a modified git repo. For example, we get\n        # output and a 129 return code when a layer isn\'t a git repo at all.\n        return "-- modified"\n', fn='/z/layerindex-master/layers/meta-poky/meta/classes/image-buildinfo.bbclass', lineno=27):
		 """
	    >    comp = better_compile(code, modulename, fn, lineno=lineno)
		 better_exec(comp, None, code, fn)
	  File "/z/layerindex-master/layers/meta-poky/bitbake/lib/bb/utils.py", line 330, in better_compile(text='def get_layer_git_status(path):\n    import subprocess\n    try:\n        subprocess.check_output("cd %s; PSEUDO_UNLOAD=1 git diff --quiet --no-ext-diff" % path,\n                                shell=True,\n                                stderr=subprocess.STDOUT)\n        return ""\n    except subprocess.CalledProcessError, ex:\n        # Silently treat errors as "modified", without checking for the\n        # (expected) return code 1 in a modified git repo. For example, we get\n        # output and a 129 return code when a layer isn\'t a git repo at all.\n        return "-- modified"\n', file='image-buildinfo.bbclass', realfile='/z/layerindex-master/layers/meta-poky/meta/classes/image-buildinfo.bbclass', mode='exec', lineno=27):
		     e = bb.BBHandledException(e)
	    >        raise e
	     
	bb.BBHandledException: invalid syntax (image-buildinfo.bbclass, line 35)