Finalize release 5.8.0
<url>http://www.keil.com/pack/</url>
<releases>
- <release version="5.8.0">
- Active development ...
+ <release version="5.8.0" date="2021-06-24">
CMSIS-Core(M): 5.5.0 (see revision history for details)
- Updated GCC LinkerDescription, GCC Assembler startup
- Added Armv8-M Stack Sealing (to linker, startup) for toolchain ARM, GCC
