Split shadow stack from SIRT.

(cherry picked from commit 4455f868a9a6553827ccbe1d25e29cf528a74422)

Change-Id: I4f467cf5be812c600dc5fdb56a9236fe144bd380
diff --git a/src/asm_support.h b/src/asm_support.h
index d5bc370..d9e57d1 100644
--- a/src/asm_support.h
+++ b/src/asm_support.h
@@ -35,7 +35,7 @@
 
 #elif defined(__i386__)
 // Offset of field Thread::self_ verified in InitCpu
-#define THREAD_SELF_OFFSET 108
+#define THREAD_SELF_OFFSET 112
 #endif
 
 #endif  // ART_SRC_ASM_SUPPORT_H_