Change in flashrom[master]: [WIP] meson: rework the programmer selection

[Thomas Heijligen (Code Review)]

Attention is currently required from: Edward O'Callaghan, Anastasia Klimchuk.
Hello build bot (Jenkins), Edward O'Callaghan, Anastasia Klimchuk,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/flashrom/+/63724

to look at the new patch set (#17).

Change subject: [WIP] meson: rework the programmer selection
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[WIP] meson: rework the programmer selection

This is a WIP implementation for a new programmer selection. It should
work by now but has some known and unknown bugs. (see Gerrit Comments)

- Each dependency is optional and gets mandatory when the programmer is
  selected as active.
- Each programmer is defined through an entry in the programmer
  dictionary
- The entry lists systems & cpu_families where the programmer is
  supported; Dependencies, sources and flags. The group parameter is for
  selecting a set of programmer, the default parameter is to include the
  programmer to the `all` and `auto` set.
- If the programmer gets selected the `active` entry is set to true.
  The `active` entry can be used afterwards to determine if the
  programmer should be included in sources, config, documentation
- Needed system headers are represended through a pseudo dependency.
- The programmer's `srcs` attribute contains all files which are needed
  to build the programmer.

Change-Id: Ib44b26e3748fc71f116184082b4aed0bb208b4c1
Signed-off-by: Thomas Heijligen 
---
M meson.build
M meson_options.txt
M tests/meson.build
3 files changed, 412 insertions(+), 341 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/24/63724/17