runqemu: Ensure we process all tap devices

The regexp in the script misses some tap devices, e.g. we see output like:

runqemu - INFO - Acquiring lockfile /tmp/qemu-tap-locks/tap25.lock failed: [Errno 11] Resource temporarily unavailable
runqemu - INFO - Acquiring lockfile /tmp/qemu-tap-locks/tap26.lock failed: [Errno 11] Resource temporarily unavailable
runqemu - INFO - Acquiring lockfile /tmp/qemu-tap-locks/tap27.lock failed: [Errno 11] Resource temporarily unavailable
runqemu - INFO - Acquiring lockfile /tmp/qemu-tap-locks/tap28.lock failed: [Errno 11] Resource temporarily unavailable
runqemu - INFO - Acquiring lockfile /tmp/qemu-tap-locks/tap40.lock failed: [Errno 11] Resource temporarily unavailable
runqemu - INFO - Acquiring lockfile /tmp/qemu-tap-locks/tap41.lock failed: [Errno 11] Resource temporarily unavailable

What happened to tap29 to tap39?

The issue is was we were missing devices with '0' in the number,
like "10:" and so on in the output from "ip link".

(From OE-Core rev: 6447697a48e3b693ee38806bc2ba07c2a65c2bc8)

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

scripts/runqemu

@@ -923,7 +923,7 @@ class BaseConfig(object):
         logger.debug('Running %s...' % cmd)
         ip_link = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE).stdout.read().decode('utf-8')
         # Matches line like: 6: tap0: <foo>
-        possibles = re.findall('^[1-9]+: +(tap[0-9]+): <.*', ip_link, re.M)
+        possibles = re.findall('^[0-9]+: +(tap[0-9]+): <.*', ip_link, re.M)
         tap = ""
         for p in possibles:
             lockfile = os.path.join(lockdir, p)