Switch x86_64 emulator to 64 bit primary.

Also siezes the opportunity to remove the hardcoded
TARGET_PREFER_32_BIT_APPS directing in core_64_bit.mk.
This avoids the need for further hacks but needs supporting
changes to a few apps to force them to 32 bit.

Change-Id: I36ba9e5f5b08dd87d6a4afc27961a436306eed99

CleanSpec.mk

@@ -223,6 +223,10 @@ $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
 # Unset TARGET_PREFER_32_BIT_APPS for 64 bit targets.
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
 
+# Switching the x86 emulator over to a 64 bit primary zygote.
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/root/default.prop)
+
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************

target/board/generic_x86_64/device.mk

@@ -25,8 +25,7 @@ PRODUCT_PROPERTY_OVERRIDES := \
 PRODUCT_COPY_FILES := \
     device/generic/goldfish/data/etc/apns-conf.xml:system/etc/apns-conf.xml \
     device/generic/goldfish/camera/media_profiles.xml:system/etc/media_profiles.xml \
-    device/generic/goldfish/camera/media_codecs.xml:system/etc/media_codecs.xml \
-    system/core/rootdir/init.zygote64.rc:root/init.zygote64.rc
+    device/generic/goldfish/camera/media_codecs.xml:system/etc/media_codecs.xml
 
 PRODUCT_PACKAGES := \
     audio.primary.goldfish \

target/product/full_x86_64.mk

@@ -23,6 +23,10 @@
 # that isn't a wifi connection. This will instruct init.rc to enable the
 # network connection so that you can use it with ADB
 
+PRODUCT_DEFAULT_PROPERTY_OVERRIDES += ro.zygote=zygote64_32
+PRODUCT_COPY_FILES += system/core/rootdir/init.zygote64_32.rc:root/init.zygote64_32.rc
+
+
 $(call inherit-product, $(SRC_TARGET_DIR)/product/core_64_bit.mk)
 $(call inherit-product, $(SRC_TARGET_DIR)/product/aosp_base_telephony.mk)
 $(call inherit-product, $(SRC_TARGET_DIR)/board/generic_x86_64/device.mk)