[S] Change in flashrom[main]: Makefile,meson.build: Add support for Sphinx 3.x

[Anton Samsonov (Code Review)]

Attention is currently required from: Anastasia Klimchuk, Anton Samsonov, Thomas Heijligen.

Hello Anastasia Klimchuk, Thomas Heijligen, build bot (Jenkins),

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

https://review.coreboot.org/c/flashrom/+/77778?usp=email

to look at the new patch set (#5).

The following approvals got outdated and were removed:
Verified+1 by build bot (Jenkins)

Change subject: Makefile,meson.build: Add support for Sphinx 3.x
......................................................................

Makefile,meson.build: Add support for Sphinx 3.x

Prior to version 4.0, `sphinx-build` outputs man pages to "8" directory
instead of "man8" expected by Makefile and doc/meson.build. See:
    https://github.com/sphinx-doc/sphinx/issues/7996
    https://github.com/sphinx-doc/sphinx/issues/9217

Current solution is to rename "8" to "man8" after documentation build.
That enables successful build and installation, as well as dependency
tracking at build-system level, but not on `sphinx-build` own level
upon which `meson` build blindly relies.

Change-Id: I9cd280551a1ba4d17edb2e857d56f80431b61e1b
Signed-off-by: Anton Samsonov 
---
M Makefile
M doc/meson.build
A doc/sphinx-wrapper.sh
3 files changed, 41 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/78/77778/5