8216263: Add historical data for JDK 12 Summary: Including --release 12 data, based on 12-ea+30, built from changeset 6c377af36a5c. Reviewed-by: darcy, jjg

8218630: CreateSymbols includes class and module headers unnecessarily. Summary: Ensure class and module headers from the current version are properly matched to existing ones to avoid duplication. Reviewed-by: jjg

8217335: Add a script to generate --release data Reviewed-by: darcy, ihse

8217332: JTREG: Clean up, use generics instead of raw types Reviewed-by: tschatzl, sangheki

8217329: JTREG: Clean up, remove unused imports in gc folder Reviewed-by: lmesnik, tschatzl

Merge

8218411: JDK 12 L10n resource file update msg drop 20 Reviewed-by: naoto

Added tag jdk-12+31 for changeset b5f7bb57de2f

8217352: Remove EA from version string starting with Initial RC promotion Reviewed-by: erikj, tbell

8218601: [AOT] Crash in AOTCodeHeap::mark_evol_dependent_methods Summary: null check nmethod in aot dependencies Reviewed-by: kvn

8218169: [AOT] Segmentation fault when running java with AOTed Graal in -Xcomp mode on windows Reviewed-by: kvn

8218625: Remove dead code in relocInfo Reviewed-by: kvn, thartmann

8218558: NMT stack traces in output should show mt component for virtual memory allocations Reviewed-by: shade, stuefe, coleenp

8218553: Enhance keystore load debug output Reviewed-by: weijun

8218431: Improved platform checking in makefiles Reviewed-by: erikj

8218565: HandleMark cleanup Reviewed-by: coleenp, kbarrett, rehn