Patch winsparkle xml updater script: no wget

The script was using wget which is no disponible on
the build machine.
This version is more robust as it calls curl if wget isn't
installed and vice versa.

Change-Id: I033100f19d646c5f866fb37a78a11ac711eecb95

scripts/winsparkle-xml-updater.sh

@@ -16,12 +16,25 @@ if [ ! -f ${PACKAGE} ]; then
 fi
 
 if [ ! -s ${SPARKLE_FILE} ]; then
+
     wget --no-check-certificate --retry-connrefused --tries=20 --wait=2 \
          --random-wait --waitretry=10 ${SPARKLE_SOURCE} -O ${SPARKLE_FILE}
-    if [ $? -ne 0 ]; then
-        echo 'the winsparkle file have been badly overwriten; deleting it.'
-        rm -f winsparkle.xml
-        exit 1
+
+    if [ $? -eq 127 ]; then
+        rm -f ${SPARKLE_FILE}
+        COUNTER=0
+        curl --retry 2 --retry-delay 2 ${SPARKLE_SOURCE} -o ${SPARKLE_FILE}
+        until [ $? -eq 0 -o $COUNTER -gt 10 ]; do
+            sleep 1
+            let COUNTER=COUNTER+1
+            curl --retry 2 --retry-delay 2 ${SPARKLE_SOURCE} -o ${SPARKLE_FILE}
+        done
+
+        if [ $? -ne 0 ]; then
+            echo 'the winsparkle file have been badly overwriten; deleting it.'
+            rm -f winsparkle.xml
+            exit 1
+        fi
     fi
 fi