[ASan] fix test broken by argument promotion pass

compiler-rt/test/asan/TestCases/use-after-scope-capture.cpp

 // RUN: %clangxx_asan -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s
 
 #include <functional>
 
 int main() {
   std::function<int()> f;
   {
     int x = 0;
     f = [&x]() __attribute__((noinline)) {
       return x;  // BOOM
       // CHECK: ERROR: AddressSanitizer: stack-use-after-scope
-      // CHECK: #0 0x{{.*}} in {{.*}}use-after-scope-capture.cpp:[[@LINE-2]]
+      // We cannot assert the line, after the argument promotion pass this crashes
+      // in the BOOM line below instead, when the ref gets turned into a value.
+      // CHECK: #0 0x{{.*}} in {{.*}}use-after-scope-capture.cpp
     };
   }
   return f();  // BOOM
 }