Revert "Remove SUID bit for nvidia-modprobe"

I apologize, but it seems that although this worked fine on my rig, it is causing issues with creating /dev nodes, in particular /dev/nvidiactl, causing issues like #20 (closed) and #19 (closed). Man nvidia-modprobe says:

Users should not normally need to run nvidia-modprobe by hand: the NVIDIA user-space driver components will fork(2)/exec(3) it when needed.

This seems to be the reason why the SUID is still needed. I'm thinking about the possibility of replacing this with additional calls to nvidia-modprobe to create all /dev nodes in our udev rules, let me know if that solution would also suit.

Fixes: #19 (closed) #20 (closed)

PKGBUILD

@@ -297,7 +297,8 @@ package_nvidia-utils() {
     install -Dm644 nvidia-cuda-mps-control.1.gz "${pkgdir}/usr/share/man/man1/nvidia-cuda-mps-control.1.gz"
 
     # nvidia-modprobe
-    install -Dm755 nvidia-modprobe "${pkgdir}/usr/bin/nvidia-modprobe"
+    # This should be removed if nvidia fixed their uvm module!
+    install -Dm4755 nvidia-modprobe "${pkgdir}/usr/bin/nvidia-modprobe"
     install -Dm644 nvidia-modprobe.1.gz "${pkgdir}/usr/share/man/man1/nvidia-modprobe.1.gz"
 
     # nvidia-persistenced