Revert "external/boringssl: Sync to 81080a729af568f7b5fde92b9170cc17065027c9."

This reverts commit f8d8b73da16aa9f2fdda401a46b4f86a83016712.

Reason for revert: Breaks buildsdk_tools_cross_win

Change-Id: I3bac24f78d165dfa7f89b878cc2277281fd8f1ab
282 files changed