Build host valgrind binaries (x86 and amd64)

  Also fixed the problem with memset within memset
  recursive call because of clang x86_64 codegen (see TODO).

Bug: 17936452
Change-Id: I43a0ed3645925efad94456285a3c8805d5833573
diff --git a/main/Android.clean.mk b/main/Android.clean.mk
index a85907d..31ae7f4 100644
--- a/main/Android.clean.mk
+++ b/main/Android.clean.mk
@@ -23,5 +23,7 @@
 vg_local_without_system_shared_libraries :=
 vg_local_no_crt :=
 vg_local_cflags :=
-vg_local_arch_cflags :=
+vg_local_host_arch_cflags :=
+vg_local_target_arch_cflags :=
+vg_local_target_2nd_arch_cflags :=
 vg_local_c_includes :=