[compiler-rt][asan] Disable a broken test on windows 64-bits

[compiler-rt][asan] Disable a broken test on windows 64-bits

Summary:
This test is broken on wndows 64-bit.

The interception library is not able to hook on the memchr functions.

Snippet of the function that is not hookable:
```
--- No source file -------------------------------------------------------------
000007FEFA1A18CD CC                   int         3
000007FEFA1A18CE CC                   int         3
000007FEFA1A18CF CC                   int         3
--- f:\dd\vctools\crt\vcruntime\src\string\amd64_arm_arm64\memchr.c ------------
        while ( cnt && (*(unsigned char *)buf != (unsigned char)chr) ) {
000007FEFA1A18D0 4D 85 C0             test        r8,r8
000007FEFA1A18D3 74 0D                je          memchr+12h (07FEFA1A18E2h)
000007FEFA1A18D5 38 11                cmp         byte ptr [rcx],dl
000007FEFA1A18D7 74 09                je          memchr+12h (07FEFA1A18E2h)
                buf = (unsigned char *)buf + 1;
000007FEFA1A18D9 48 FF C1             inc         rcx
                cnt--;
000007FEFA1A18DC 49 83 E8 01          sub         r8,1
000007FEFA1A18E0 75 F3                jne         memchr+5h (07FEFA1A18D5h)
        }
```

Reviewers: rnk

Subscribers: kubabrecka, dberris, llvm-commits, chrisha

Differential Revision: https://reviews.llvm.org/D25037

llvm-svn: 282860