shellcheck fixes

* Script: https://github.com/koalaman/shellcheck
* Use $(..) instead of deprecated `..`
* Use double quote to prevent globbing and word splitting.

Change-Id: I68372d4e29ae34e0704e5a605447ad17bf0666d7

scripts/update-jquery-ime.sh

@@ -2,7 +2,7 @@
 
 DEST="../lib/jquery.ime";
 CLONEDIR="/tmp/jquery.ime";
-HERE=`pwd`;
+HERE=$(pwd);
 UPSTREAM="https://github.com/wikimedia/jquery.ime.git";
 
 echo -e "Getting latest jquery.ime from $UPSTREAM\n";
@@ -16,5 +16,5 @@ fi
 cd $CLONEDIR;
 npm install;
 grunt copy concat;
-cd $HERE;
+cd "$HERE";
 cp -rf $CLONEDIR/dist/jquery.ime/{images,css,rules,jquery.ime.js} $DEST;