Nexus 5/WIP

Documenting bringup.

• Kernel tree used: https://gitlab.com/postmarketOS/linux-postmarketos/tree/09efb4857f1a4119eced855912043817bd96e064
• Kernel config used: https://gitlab.com/postmarketOS/pmaports/blob/master/main/linux-postmarketos-qcom/config-postmarketos-qcom.armhf
• Kernel patch(es) applied: https://gitlab.com/postmarketOS/pmaports/blob/master/main/linux-postmarketos-qcom/0001-Fix-Hammerhead-backlight.patch

Kernel config wasn't adequate, lacked support for USB_STORAGE and SCSI, BLK_DEV_SD, SCSI_GENERIC, etc. (Not sure if the options are exactly ok, but mostly).

Now able to boot from usb stick (external root): https://wizzup.org/leste-n5-initial.jpg

Next up: (much) smaller initramfs (since fastboot requires that we have one), arrange serial/network, fix xorg.conf, look at msm-fb-refresher (if we need it).

Then, see if we can boot to hildon-desktop.

Once that works, I'm hoping someone else will make a multirom image.