create install package for kext

reference:
http://developer.apple.com/library/mac/#documentation/Darwin/Conceptual/KEXTConcept/KEXTConceptPackaging/packaging_tutorial.html%23//apple_ref/doc/uid/20002368-CHDCBCJA

1. create dir for kext
    cd /tmp
    sudo mkdir  tempKext

2. copy kext into dir
   cd /KEXT_PROJECT_PATH/build/Release
   sudo cp -R test.kext  /tmp/tempKext

3. use PackageMaker to create install package
    (/Developer/Application/Utilities)
    drag tempKext dir into PackageMaker window
    save editing result as .pmdoc file( PackageMaker file)

4. build
    create .pkg file (install file)

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