framework: Resolve compilation warnings

[Treece-Burgess]

Pull Request Description

This pull request resolves compilation warnings that are encountered with the following configure on Methane at ICL:

./configure --prefix=$PWD/test-install  --enable-warnings

Note: There still will exist a singular compilation warning that involves avail.F and fmultiplex2.F. I believe the solution to resolve these compilation warnings deserves a separate PR.

Testing

Testing was done on Methane at ICL, the following were the results:

• PAPI build: ✅
• PAPI utilities*: ✅ (matches master branch)
• perf_event component tests: ✅ (matches master branch)
• perf_event_uncore component tests: ✅ (matches master branch)
• sysdetect component tests: ✅ (matches master branch)

* - Utilities ran include papi_avail, papi_native_avail, papi_command_line, papi_hardware_avail

Author Checklist

• Description
  Why this PR exists. Reference all relevant information, including background, issues, test failures, etc
• Commits
  Commits are self contained and only do one thing
  Commits have a header of the form: module: short description
  Commits have a body (whenever relevant) containing a detailed description of the addressed problem and its solution
• Tests
  The PR needs to pass all the tests