contrib/*sysmo.sh: Fix default poky SDK path

ansible scripts are installing the SDK in "poky-sdk" dir, not "poky" one.

Change-Id: I002fde53684cd4a43c9f22e09264056f2a950c24
diff --git a/contrib/jenkins-build-osmo-bts-sysmo.sh b/contrib/jenkins-build-osmo-bts-sysmo.sh
index 82dae39..fc528d3 100755
--- a/contrib/jenkins-build-osmo-bts-sysmo.sh
+++ b/contrib/jenkins-build-osmo-bts-sysmo.sh
@@ -5,7 +5,7 @@
 _poky_path="$POKY_PATH"
 
 [ -z "$_poky_version" ] && _poky_version="2.3.4"
-[ -z "$_poky_path" ] && _poky_path="/opt/poky/$_poky_version"
+[ -z "$_poky_path" ] && _poky_path="/opt/poky-sdk/$_poky_version"
 
 . "$_poky_path/environment-setup-armv5te-poky-linux-gnueabi"