bitbake: fetch2: add support for .debs containing uncompressed data tarballs

Some .deb files contain uncompressed data tarballs which do not have an
additional file extension after `.tar`. Add support for such cases while
preserving the existing behaviour.

(Bitbake rev: e3834deb427ceb1d1ae9a96c1e0dec990d7f3805)

Signed-off-by: Isaac True <isaac.true@emlix.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/fetch2/__init__.py

@@ -1589,11 +1589,11 @@ class FetchMethod(object):
                 datafile = None
                 if output:
                     for line in output.decode().splitlines():
-                        if line.startswith('data.tar.'):
+                        if line.startswith('data.tar.') or line == 'data.tar':
                             datafile = line
                             break
                     else:
-                        raise UnpackError("Unable to unpack deb/ipk package - does not contain data.tar.* file", urldata.url)
+                        raise UnpackError("Unable to unpack deb/ipk package - does not contain data.tar* file", urldata.url)
                 else:
                     raise UnpackError("Unable to unpack deb/ipk package - could not list contents", urldata.url)
                 cmd = 'ar x %s %s && %s -p -f %s && rm %s' % (file, datafile, tar_cmd, datafile, datafile)