Allow for custom address spaces

Julia uses addressspaces for GC and we want these to be sanitized as well.

(cherry picked from commit 3f53397)
(cherry picked from commit 58df73b)
(cherry picked from commit d0b1303)
(cherry picked from commit bd7a76c)
(cherry picked from commit 5e712dc)

Author: vchuravy

llvm/lib/Transforms/Instrumentation/ThreadSanitizer.cpp

@@ -371,7 +371,9 @@ static bool shouldInstrumentReadWriteFromAddress(const Module *M, Value *Addr) {
   // with them.
   if (Addr) {
     Type *PtrTy = cast<PointerType>(Addr->getType()->getScalarType());
-    if (PtrTy->getPointerAddressSpace() != 0)
+    auto AS = PtrTy->getPointerAddressSpace();
+    // Allow for custom addresspaces
+    if (AS != 0 && AS < 10)
       return false;
   }