[compiler-rt] [TSan] Fix p == end == ShadowMem::end in ShadowSet (PR #144994)

[Thurston Dang via llvm-commits]

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@@ -523,7 +523,7 @@ ALWAYS_INLINE USED void UnalignedMemoryAccess(ThreadState* thr, uptr pc,
 }
 
 void ShadowSet(RawShadow* p, RawShadow* end, RawShadow v) {
-  DCHECK_LE(p, end);
+  DCHECK_LT(p, end);
   DCHECK(IsShadowMem(p));
   DCHECK(p == end || IsShadowMem(end - 1));
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thurstond wrote:

`DCHECK_LT(p, end);` means the `p == end` part of the DCHECK will always be false.

https://github.com/llvm/llvm-project/pull/144994