[XRay] Account for virtual memory re-use
[XRay] Account for virtual memory re-use

Change the assumption when releasing memory to a buffer queue that new
generations might not be able to re-use the memory mapped addresses.

git-svn-id: c199f293c43da69278bea8e88f92242bf3aa95f7@344882 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt