[PATCH] Tweak compiler warning flags to reduce unneeded output

[PATCH] Tweak compiler warning flags to reduce unneeded output

-Wno-gnu-statement-expression-from-macro-expansion and
-Wno-c99-extensions are non-existent options that add more noise than
they fix. Additionally, -Wpedantic is enabled by default which causes a
lot of noise, so disable that. Finally, add
-Wno-missing-field-initializers to quiet down the final bits of PipeWire
API.

Gbp-Pq: Name upstream_686df1e3_Tweak-compiler-warning-flags-to-reduce-unneeded-output.patch