osx_install/forge_scripts/postinstall: Grabbing correct glfw package
osx_install/forge_scripts/postinstall: Grabbing correct glfw package

The brew package manager renamed the GLFW packge from `glfw3` to `glfw`. This
pull request reflects these changes in our `postinstall` script.

9prady9/arrayfire,umar456/arrayfire,shehzan10/arrayfire,arrayfire/arrayfire,9prady9/arrayfire,umar456/arrayfire,arrayfire/arrayfire,shehzan10/arrayfire,9prady9/arrayfire,munnybearz/arrayfire,9prady9/arrayfire,umar456/arrayfire,munnybearz/arrayfire,arrayfire/arrayfire,munnybearz/arrayfire,arrayfire/arrayfire,umar456/arrayfire,shehzan10/arrayfire,shehzan10/arrayfire