[asan] specify c++ version in tests to fix compile error

[aralisza]

Summary

If we don't specify the c++ version in these tests, it could cause compile errors because the compiler could default to an older c++

rdar://75247244

compiler-rt/test/asan/TestCases/asan_update_allocation.cpp

-// RUN: %clangxx_asan -O0 %s -o %t
+// RUN: %clangxx_asan -O0 %s --std=c++11 -o %t
 
 // RUN: not %run %t 10 0 2>&1 | FileCheck %s --check-prefixes=CHECK,T0
 // RUN: not %run %t 10000000 0 2>&1 | FileCheck %s --check-prefixes=CHECK,T0
 
 // RUN: not %run %t 10 1 2>&1 | FileCheck %s --check-prefixes=CHECK,T1
 // RUN: not %run %t 10000000 1 2>&1 | FileCheck %s --check-prefixes=CHECK,T1
 
 // REQUIRES: stable-runtime

compiler-rt/test/asan/TestCases/lsan_crash.cpp

-// RUN: %clangxx_asan -O2 %s -o %t && %run %t
+// RUN: %clangxx_asan -O2 %s --std=c++11 -o %t && %run %t
 
 #include <atomic>
 #include <memory>
 #include <sanitizer/lsan_interface.h>
 #include <thread>
 #include <vector>
 
 std::atomic<bool> done;