Make which dex2oat version to use configurable.

Change-Id: Ic13cf6f9dfb117193a5101781945c501d138955c
diff --git a/core/dex_preopt.mk b/core/dex_preopt.mk
index 76fc130..02e812d 100644
--- a/core/dex_preopt.mk
+++ b/core/dex_preopt.mk
@@ -67,7 +67,7 @@
 $(call dex2oat-one-file,$(1),$(2))
 endef
 
-DEXPREOPT_ONE_FILE_DEPENDENCY_TOOLS := $(DEX2OATD_DEPENDENCY)
+DEXPREOPT_ONE_FILE_DEPENDENCY_TOOLS := $(DEX2OAT_DEPENDENCY)
 DEXPREOPT_ONE_FILE_DEPENDENCY_BUILT_BOOT_PREOPT := $(DEFAULT_DEX_PREOPT_BUILT_IMAGE_FILENAME)
 ifdef TARGET_2ND_ARCH
 $(TARGET_2ND_ARCH_VAR_PREFIX)DEXPREOPT_ONE_FILE_DEPENDENCY_BUILT_BOOT_PREOPT := $($(TARGET_2ND_ARCH_VAR_PREFIX)DEFAULT_DEX_PREOPT_BUILT_IMAGE_FILENAME)