JIT: fix executable flush range

Flushing in executable memory should exactly mirror range in
non-executable memory.

Test: Manual (see bug)
Bug: 132205399
Merged-In: I19d2e8e69eef07648803937fff928aa9b45ac5a2
Change-Id: I6a26e4aa236e190ce4117c0aa20f6067892d7f1c
1 file changed