v24.05 release

* Math routine changes
  * Fixed AdvSIMD vector powf and log for the big-endian target.
  * Fixed an undefined signed shift in the exp10 code, unlikely
    to cause problems in practice.
  * AdvSIMD pow got minor optimizations.
  * Now there is a build option to disable SIMD and exp10 tests
    to allow testing libcs without those symbols.
* pl/ directory
  * Several big-endian fixes and code cleanups.
  * This continues to host many math routines with mixed quality.

Author: nsz-arm

README

@@ -12,7 +12,7 @@ contribution requirements are documented in README.contributors of
 the appropriate subdirectory.
 
 Regular quarterly releases are tagged as vYY.MM, the latest
-release is v24.01.
+release is v24.05.
 
 Source code layout: