subprojects: Add phosphor-logging wrap

Addresses the following error:

```
$ meson setup build
...
Dependency hei from subproject subprojects/libhei found: YES 0.1
Run-time dependency phosphor-logging found: NO (tried pkgconfig and cmake)
Looking for a fallback subproject for the dependency phosphor-logging

meson.build:62:23: ERROR: Neither a subproject directory nor a phosphor-logging.wrap file was found.
```

Change-Id: I8b933009a4a282a7c0defcd672986aeeff0bdf2a
Signed-off-by: Andrew Jeffery <andrew@codeconstruct.com.au>
1 file changed
tree: 0ea048e2c000a7475de5b9233a6e48a4d8317ad4
  1. analyzer/
  2. attn/
  3. subprojects/
  4. test/
  5. util/
  6. .clang-format
  7. .eslintignore
  8. .gitignore
  9. .prettierignore
  10. .prettierrc.yaml
  11. buildinfo.hpp.in
  12. cli.cpp
  13. cli.hpp
  14. config.h.in
  15. LICENSE
  16. listener.cpp
  17. listener.hpp
  18. main.cpp
  19. main_nl.cpp
  20. meson.build
  21. meson.options
  22. OWNERS
  23. README.md
README.md

Hardware Diagnostics for POWER Systems

In the event of a system fatal error reported by the internal system hardware (processor chips, memory chips, I/O chips, system memory, etc.), POWER Systems have the ability to diagnose the root cause of the failure and perform any service action needed to avoid repeated system failures.

Aditional details TBD.

Building

For a standard OpenBMC release build, you want something like:

meson -Dtests=disabled <build_dir>
ninja -C <build_dir>
ninja -C <build_dir> install

For a test / debug build, a typical configuration is:

meson -Dtests=enabled <build_dir>
ninja -C <build_dir> test