Change LIBART_IMG_TARGET_BASE_ADDRESS to 0x70000000

Required for getting ART with valgrind on device working since
valgrind maps things in the 0x60000000 address range.

Bug: 13323732

Change-Id: I05efdbf3fe5acd1418e1d4ced5844154fb4c5d37
diff --git a/core/dex_preopt_libart.mk b/core/dex_preopt_libart.mk
index 70ffee9..413fcfc 100644
--- a/core/dex_preopt_libart.mk
+++ b/core/dex_preopt_libart.mk
@@ -48,7 +48,7 @@
 ifeq ($(TARGET_ARCH),mips)
 LIBART_IMG_TARGET_BASE_ADDRESS := 0x30000000
 else
-LIBART_IMG_TARGET_BASE_ADDRESS := 0x60000000
+LIBART_IMG_TARGET_BASE_ADDRESS := 0x70000000
 endif
 
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