[Bug sanitizer/82824] [8 regression] libsanitizer fails to build: VM_MEMORY_OS_ALLOC_ONCE undefined

[ro at CeBiTec dot Uni-Bielefeld.DE]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82824

--- Comment #14 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot 
Uni-Bielefeld.DE> ---
That's the value of VM_MEMORY_OS_ALLOC_ONCE on Mac OS X 10.9 and up.