Change alloc space lock level
Moves the alloc space lock level to a lower level than the default lock.
This fixes https://b.corp.google.com/issue?id=9414652
which was caused by occasionally having a large object which was in the
globals indirect reference table in JavaVMExt. The old lock ordering had
alloc spack with a higher level than the default lock, this caused occasional
lock ordering violations since the lock which guarded the globals table was
1 file changed