Provisioning: Add chmod +x to Squish .run file

This file needs execution rights before it can be run in provisioning.

Change-Id: Id49de89e0260b18a71cbcd4f4dc2b5a28e0a9890
Reviewed-by: Heikki Halmet <heikki.halmet@qt.io>
Reviewed-by: Johanna Äijälä <johanna.aijala@qt.io>
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@qt.io>

coin/provisioning/common/unix/squishInstall.sh

@@ -129,6 +129,7 @@ function MountAndInstall {
         echo "'run-file', no need to uncompress"
         sudo cp $targetFileMount $targetDirectory
         UnMount
+        sudo chmod +x $targetDirectory/$targetFile
         sudo $targetDirectory/$targetFile unattended=1 targetdir="$targetDirectory/package" qtpath="$targetDirectory" > /dev/null 2>&1
         sudo rm -fr "$targetDirectory/$targetFile"
         if uname -a |grep -q "Ubuntu"; then