Add ART_DEXPREOPT_BOOT_JAR_DIR.

Replaces DEXPREOPT_BOOT_JAR_DIR which was removed here:
https://android-review.googlesource.com/q/topic:%22dexpreopt_bootjars%22+(status:open%20OR%20status:merged)

Test: art/tools/run-gtests.sh
Change-Id: Ic09ccc17fa689fcb23383e7abda4b9ac24ec2ff1
diff --git a/build/Android.common_path.mk b/build/Android.common_path.mk
index c321733..625444f 100644
--- a/build/Android.common_path.mk
+++ b/build/Android.common_path.mk
@@ -79,7 +79,7 @@
 TARGET_CORE_IMG_JARS := $(addsuffix -testdex,$(CORE_IMG_JARS))
 HOST_CORE_IMG_DEX_LOCATIONS   := $(foreach jar,$(HOST_CORE_IMG_JARS),  $(HOST_OUT_JAVA_LIBRARIES)/$(jar).jar)
 ifeq ($(ART_TEST_ANDROID_ROOT),)
-TARGET_CORE_IMG_DEX_LOCATIONS := $(foreach jar,$(TARGET_CORE_IMG_JARS),/$(DEXPREOPT_BOOT_JAR_DIR)/$(jar).jar)
+TARGET_CORE_IMG_DEX_LOCATIONS := $(foreach jar,$(TARGET_CORE_IMG_JARS),/$(ART_DEXPREOPT_BOOT_JAR_DIR)/$(jar).jar)
 else
 TARGET_CORE_IMG_DEX_LOCATIONS := $(foreach jar,$(TARGET_CORE_IMG_JARS),$(ART_TEST_ANDROID_ROOT)/$(jar).jar)
 endif
@@ -92,7 +92,7 @@
 TARGET_TEST_CORE_JARS := $(addsuffix -testdex,$(TEST_CORE_JARS))
 HOST_CORE_DEX_LOCATIONS   := $(foreach jar,$(HOST_TEST_CORE_JARS),  $(HOST_OUT_JAVA_LIBRARIES)/$(jar).jar)
 ifeq ($(ART_TEST_ANDROID_ROOT),)
-TARGET_CORE_DEX_LOCATIONS := $(foreach jar,$(TARGET_TEST_CORE_JARS),/$(DEXPREOPT_BOOT_JAR_DIR)/$(jar).jar)
+TARGET_CORE_DEX_LOCATIONS := $(foreach jar,$(TARGET_TEST_CORE_JARS),/$(ART_DEXPREOPT_BOOT_JAR_DIR)/$(jar).jar)
 else
 TARGET_CORE_DEX_LOCATIONS := $(foreach jar,$(TARGET_TEST_CORE_JARS),$(ART_TEST_ANDROID_ROOT)/framework/$(jar).jar)
 endif