Separate oat from image

Change-Id: If2abdb99826ead14e3465d90ba2acffd89709389
diff --git a/src/globals.h b/src/globals.h
index 2fb0225..e5fead6 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -38,6 +38,9 @@
 // Required object alignment
 const int kObjectAlignment = 8;
 
+// Required ARM instruction alignment
+const int kArmAlignment = 4;
+
 // System page size.  Normally you're expected to get this from
 // sysconf(_SC_PAGESIZE) or some system-specific define (usually
 // PAGESIZE or PAGE_SIZE).  If we use a simple compile-time constant