[TIMOB-10582] iOS: Xcode 4.4.1: libxml not being found on some systems when creating project in studio and trying to build with Xcode

On some of our test systems, attempting to run Studio-produced Xcode projects fails to compile. This is hard to determine if a regression as it is restricted to certain systems. We have limited information on why this is occurring, but Sabil has found that placing a set of quotes around the $SDK root entry in the header paths resolves the issue for affected systems. For example, changing ${SDKROOT}/usr/include/libxml2 to "${SDKROOT}"/usr/include/libxml2. This may be related somehow to the images used to create our Mountain Lion partitions. Also of note, on the affected systems the Studio build for device and for simulator function as expected. Steps to reproduce 1) Have IT install your Mountain Lion image 2) Install Xcode 4.4.1 3) Create a new project using Studio 4) Build the project (simulator or device) 5) Navigate to the build folder 6) Double-click the Xcode project file 7) In Xcode, attempt to build the project Result: Compile fails, please see screenshot Expected: Compile functions as expected.