SYSFS_PORT_SPLIT_RE is not defined

[bkavanagh]

SYSFS_PORT_SPLIT_RE, which I assume is supposed to be a compiled regex; is not defined.

`
#adb/common.py
#ln 194

@classmethod
def PortPathMatcher(cls, port_path):
 """Returns a device matcher for the given port path."""
 if isinstance(port_path, basestring):
 # Convert from sysfs path to port_path.
 port_path = [int(part) for part in SYSFS_PORT_SPLIT_RE.split(port_path)]
 return lambda device: device.port_path == port_path

`

[phhusson]

Proposed fix at #45