Use LOCAL_MULTILIB to build host lib as 64-bit

Also we should use LOCAL_REQUIRED_MODULES instead of
LOCAL_ADDITIONAL_DEPENDENCIES.

Bug: 13751317
Change-Id: I742ff14b3de168e14e646749cf4f6bc9c9e7bc62
diff --git a/tools/dicttool/NativeLib.mk b/tools/dicttool/NativeLib.mk
index a3d3c02..812e76c 100644
--- a/tools/dicttool/NativeLib.mk
+++ b/tools/dicttool/NativeLib.mk
@@ -21,8 +21,7 @@
 LATINIME_DIR_RELATIVE_TO_DICTTOOL := ../..
 
 ifneq ($(strip $(HOST_JDK_IS_64BIT_VERSION)),)
-LOCAL_CFLAGS += -m64
-LOCAL_LDFLAGS += -m64
+LOCAL_MULTILIB := 64
 endif #HOST_JDK_IS_64BIT_VERSION
 
 LOCAL_CFLAGS += -DHOST_TOOL -fPIC