Separated the creating of the fdisk scripts with it's invocation.
Separated the creating of the fdisk scripts with it's invocation.

With this change it become easy to conditionally add steps for fdisk.

racing-tech/rrp-raspi-installer,beylsp/rpi-installer,FooDeas/raspberrypi-ua-netinst,yodaaut/raspbian-ua-netinst,racing-tech/rrp-raspi-installer,beylsp/rpi-installer