Update headers to match .in changes.

jemalloc_internal.h.in and jemalloc_internal_defs.h.in have been
updated. This change updates the corresponding files to include the
new changes.

Bug: 21326736
(cherry picked from commit cb4217087d4d5b1271f8316515f5e71f087b3162)

Change-Id: I9290e16cc4689b63999e616acae1290eb8d25001
2 files changed