[oe] ushare_hg problems

[Przemyslaw Wesolek]

After commit f60bce0c2475242b733b28998b2de5c7b6e01a4c, I have problems
parsing newly added recipes/ushare/ushare_hg.bb:

> NOTE: Handling BitBake files: \ (4122/7940) [51 %]ERROR: SRCREV was used yet no valid SCM was found in SRC_URI
> NOTE: <class 'bb.fetch.ParameterError'>: while evaluating:
> ${@bb.fetch.get_srcrev(d)}
> NOTE: <class 'bb.fetch.ParameterError'>: while evaluating:
> r1+hg${SRCPV}
> NOTE: <class 'bb.fetch.ParameterError'>: while evaluating:
> ${PN}-${EXTENDPE}${PV}-${PR}
> NOTE: <class 'bb.fetch.ParameterError'>: while evaluating:
> ${TMPDIR}/work/${MULTIMACH_TARGET_SYS}/${PF}
> NOTE: <class 'bb.fetch.ParameterError'>: while evaluating:
> ${WORKDIR}/ushare
> NOTE: <class 'bb.fetch.ParameterError'>: while evaluating:
> ${S}
> ERROR:  while parsing /home/jest/miszmasz/angstrom.dev/openembedded/recipes/ushare/ushare_hg.bb
> NOTE: Handling BitBake files: | (7940/7940) [100 %]
> NOTE: Parsing finished. 7306 cached, 310 parsed, 323 skipped, 0 masked.
> ERROR: Parsing errors found, exiting...

Przemek