RTEMS | spec/build/cpukit/optwarn.yml: Update warning CFLAGS (!969)

[Joel Sherrill (@joel)]

Joel Sherrill created a merge request: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/969

Project:Branches: joel/rtems:update-warning-flags to rtems/rtos/rtems:main
Author:   Joel Sherrill
Assignee: Joel Sherrill



## Summary

spec/build/cpukit/optwarn.yml: Update warning CFLAGS

Warnings enabled by -Wextra have not been addressed except for
-Wcast-function-type and -Wsign-compare.


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View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/969
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