[compiler-rt][asan] Fix incorrect regexp breaking an asan unittest on win64

[etienneb]

Summary

On windows, the memcpy and memmove function can be the same.
This is correcly detected when hooking, but it's not possible
to report the right function name when doing symbolisation.

The same fix was applied for the static asan unittest.
We forgot to apply the fix for the dynamic asan tests.

lvm\projects\compiler-rt\test\asan/TestCases/Windows/.svn/text-base/intercept_memcpy.cc.svn-base:// CHECK-NEXT:  __asan_{{.*}}mem{{.*}}

This patch is fixing this test (win64):

ddressSanitizer-x86_64-windows-dynamic :: TestCases/Windows/dll_intercept_memcpy_indirect.cc

test/asan/TestCases/Windows/dll_intercept_memcpy_indirect.cc

if (buff1[2] != buff2[2])
     return 2;
   printf("Initial test OK\n");
   fflush(0);
 // CHECK: Initial test OK
 
   call_memcpy(&memcpy, buff2, buff1, 6);
 // CHECK: AddressSanitizer: stack-buffer-overflow on address [[ADDR:0x[0-9a-f]+]]
 // CHECK: WRITE of size 6 at [[ADDR]] thread T0
-// CHECK-NEXT:  __asan_{{.*}}memcpy
+// CHECK-NEXT:  __asan_{{.*}}mem{{.*}}
 // CHECK-NEXT:  call_memcpy
 // CHECK-NEXT:  test_function {{.*}}dll_intercept_memcpy_indirect.cc:[[@LINE-5]]
 // CHECK: Address [[ADDR]] is located in stack of thread T0 at offset {{.*}} in frame
 // CHECK-NEXT:  test_function {{.*}}dll_intercept_memcpy_indirect.cc
 // CHECK: 'buff2' <== Memory access at offset {{.*}} overflows this variable
   return 0;
 }