[ESan][MIPS] Adds support for MIPS64

With this patch 12 out of 13 tests are passing.

Reviewed by zhaoqin.
Differential: D23799 

llvm-svn: 283435
diff --git a/compiler-rt/lib/esan/esan_linux.cpp b/compiler-rt/lib/esan/esan_linux.cpp
index aa961b6..014205c 100644
--- a/compiler-rt/lib/esan/esan_linux.cpp
+++ b/compiler-rt/lib/esan/esan_linux.cpp
@@ -25,7 +25,7 @@
 namespace __esan {
 
 void verifyAddressSpace() {
-#if SANITIZER_LINUX && defined(__x86_64__)
+#if SANITIZER_LINUX && (defined(__x86_64__) || SANITIZER_MIPS64)
   // The kernel determines its mmap base from the stack size limit.
   // Our Linux 64-bit shadow mapping assumes the stack limit is less than a
   // terabyte, which keeps the mmap region above 0x7e00'.