build-osx-app.sh: Quote cmd line requirement arguments for pip
build-osx-app.sh: Quote cmd line requirement arguments for pip

Fix an error due to a failed glob expansion (`shopt -s failglob` is in
effect in the script)

qPCR4vir/orange3,qPCR4vir/orange3,cheral/orange3,qPCR4vir/orange3,cheral/orange3,qPCR4vir/orange3,cheral/orange3,cheral/orange3,qPCR4vir/orange3,qPCR4vir/orange3,cheral/orange3,cheral/orange3