Also turn down the logging for dex2oat on the boot image

Bug: 27499257
Change-Id: I190ce72b44e49451dab44902e2ca33dd5c2815ce
diff --git a/core/dex_preopt_libart_boot.mk b/core/dex_preopt_libart_boot.mk
index b81f0dd..b51ab8a 100644
--- a/core/dex_preopt_libart_boot.mk
+++ b/core/dex_preopt_libart_boot.mk
@@ -59,7 +59,8 @@
 	@rm -f $(dir $@)/*.art $(dir $@)/*.oat
 	@rm -f $(dir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)LIBART_TARGET_BOOT_OAT_UNSTRIPPED))/*.art
 	@rm -f $(dir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)LIBART_TARGET_BOOT_OAT_UNSTRIPPED))/*.oat
-	$(hide) $(DEX2OAT) --runtime-arg -Xms$(DEX2OAT_IMAGE_XMS) --runtime-arg -Xmx$(DEX2OAT_IMAGE_XMX) \
+	$(hide) ANDROID_LOG_TAGS="*:e" $(DEX2OAT) --runtime-arg -Xms$(DEX2OAT_IMAGE_XMS) \
+		--runtime-arg -Xmx$(DEX2OAT_IMAGE_XMX) \
 		--image-classes=$(PRELOADED_CLASSES) \
 		$(addprefix --dex-file=,$(LIBART_TARGET_BOOT_DEX_FILES)) \
 		$(addprefix --dex-location=,$(LIBART_TARGET_BOOT_DEX_LOCATIONS)) \