Reviewed-by: dholmes

Summary: check cacheline sine only for one core on sun4v SPARC systems.
Reviewed-by: kvn

Summary: Add SO_AllCodeCache to root scanning options when not unloading classes with a CMS collection cycle
Reviewed-by: mgerdin, jwilhelm

Reviewed-by: tbell, iris

Summary: Fix up GPL headers by removing leading "#" so that the RE script works.
Reviewed-by: brutisso, coleenp

Summary: Fix up GPL headers so that the RE script works.
Reviewed-by: stefank, dholmes, coleenp

Summary: fix typo in GPL header
Reviewed-by: kvn, dholmes

Summary: Partial backport of 8080600 to make AArch64 a known platform
Reviewed-by: dholmes, coleenp