Remove compiler warnings when building the emulator.

This forces -Wall during the build. Note that this patch doesn't
remove all warnings, but most of the remaining ones are from upstream anyway.

Change-Id: I8808d8495e99866e156ce5780d2e3c305eab491f
diff --git a/memcheck/memcheck_util.h b/memcheck/memcheck_util.h
index d4f6c8a..b75ee53 100644
--- a/memcheck/memcheck_util.h
+++ b/memcheck/memcheck_util.h
@@ -24,7 +24,7 @@
 #endif  // CONFIG_MEMCHECK
 
 #include "memcheck_common.h"
-#include "elff_api.h"
+#include "elff/elff_api.h"
 
 #ifdef __cplusplus
 extern "C" {