owfs: add UPSTREAM_CHECK_GITTAGREGEX variable

Fixes:
$ devtool latest-version owfs
...
INFO: Current version: 3.2p4
INFO: Latest version: 3.2

Signed-off-by: Ankur Tyagi <ankur.tyagi85@gmail.com>
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>

meta-filesystems/recipes-filesystems/owfs/owfs_3.2p4.bb

@@ -16,6 +16,7 @@ SRC_URI = "git://github.com/owfs/owfs;branch=master;protocol=https;tag=v${PV} \
            file://owserver \
            "
 
+UPSTREAM_CHECK_GITTAGREGEX = "v(?P<pver>\d+(\.\d+)+p\d+)"
 
 inherit autotools-brokensep update-rc.d pkgconfig systemd