QMake generated "Project Copy" script for XCode does not work with spaces

If an application target name has spaces in it, qmake's "Project Copy" script will not work, because it generates a cp statement without quotes.

For example, in our project's build directory, the entire script's text is:

#!/bin/sh
cp -r $BUILT_PRODUCTS_DIR/$FULL_PRODUCT_NAME /Users/alexmont/macDbg/src/Malpua/source

which fails because the cp statement isn't quoted.