Echo to log on each IDE version installed

If the download/installation process is going slowly when installing a lot of IDE versions this function may cause the build to fail due to exceeding Travis CI's 10 minutes without log output timeout so it's necessary to periodically print something.

Author: per1234

arduino-ci-script.sh

@@ -236,6 +236,8 @@ function install_ide()
   eval "$INSTALLED_IDE_VERSION_LIST_ARRAY"
   local IDEversion
   for IDEversion in "${IDEversionListArray[@]}"; do
+    # If the download/installation process is going slowly when installing a lot of IDE versions this function may cause the build to fail due to exceeding Travis CI's 10 minutes without log output timeout so it's necessary to periodically print something.
+    echo "Installing: $IDEversion"
     # Determine download file extension
     local tgzExtensionVersionsRegex="1.5.[0-9]"
     if [[ "$IDEversion" =~ $tgzExtensionVersionsRegex ]]; then