gupnp-tools: Fix filename

Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

diff --git a/meta/packages/gupnp/gupnp-tools-0.8.bb b/meta/packages/gupnp/gupnp-tools_0.8.bb
similarity index 100%
rename from meta/packages/gupnp/gupnp-tools-0.8.bb
rename to meta/packages/gupnp/gupnp-tools_0.8.bb