[PATCH] Do not sanitize kernel area on 32-bit targets

[Yury Gribov]

================
Comment at: lib/sanitizer_common/sanitizer_posix.cc:65
@@ +64,3 @@
+  uptr res = (1ULL << 32) - 1;  // 0xffffffff;
+  res -= GetKernelStartAddress();
+  return res;
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May make sense to do a sanitity CHECK_LT((uptr)&res, res).


http://llvm-reviews.chandlerc.com/D3119