Introduce architecture restriction logic for the gdb test. (RH2041970)
Replace GCC 11 patch to remove use of the register keyword with correct fix to ADLC build (JDK-8281098)
Adjust JDK8199936/PR3533 -mstackrealign patch to instead pass -mincoming-stack-boundary=2 -mpreferred-stack-boundary=4
Explicitly list JIT architectures rather than relying on those with slowdebug builds
Disable the serviceability agent on Zero architectures even when the architecture itself is supported
Add backport of JDK-8257794 to fix bogus assert on slowdebug x86-32 Zero builds
Related: rhbz#2022823
Andrew Hughes