Revert "Disable test reruns on arm unless explicitly marked with --rerun-all-issues"
Revert "Disable test reruns on arm unless explicitly marked with --rerun-all-issues"

and
Revert "prevent rerun logic from kicking in on test runs including aarch64."

This reverts commits:
r255719
r255747

git-svn-id: 4c4cc70b1ef44ba2b7963015e681894188cea27e@255935 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lldb,llvm-mirror/lldb,llvm-mirror/lldb,apple/swift-lldb,apple/swift-lldb,apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,apple/swift-lldb