This should fix compilation on aarch64.

Adds Sigma 5 Encoder GTAGs

Add build-essential to install list

Add mesaflash availability info on Fedora

Add CI via github actions

anyio: Add --device AUTO and --device SPI

Fix -Wformat= warnings

Testing performed:  Both found an attached SPI device on a Pi4 e.g.,

    $ ./mesaflash --device auto --addr /dev/spidev0.0 --spi --readhmid | head -1
    unable to set bpw32, fallback to bpw8
    Configuration Name: HOSTMOT2

Mostly, this involves using the "z" length modifier where a sizeof() is involved

hostmot2.c:50:20: warning: ‘hm2_get_pin_secondary_name’ defined but not used [-Wunused-function]
 static const char* hm2_get_pin_secondary_name(hm2_pin_desc_t *pin) {
                    ^~~~~~~~~~~~~~~~~~~~~~~~~~

Allow to pass VERSION string from the build system

Usage:
  $ CFLAGS='-DVERSION=\"version-string\"' make

Signed-off-by: Damian Wrobel <dwrobel@ertelnet.rybnik.pl>

This fixes a lintian warning.