Conform SGS2 SD cards to AOSP standard (2/3)

Same patch as on SGS1, swap their mountpoints but force switchexternal.
Useful for new users coming to CM from stock as this is expected behavior,
but will also fix the logic in CMParts.

Patchset 2: Move setting to a more specific location.

Change-Id: Ib28149a67c872a1c484b15ec2a02a2184e14a127

galaxys2.mk

@@ -83,7 +83,8 @@ PRODUCT_PROPERTY_OVERRIDES += \
        mobiledata.interfaces=pdp0,eth0,gprs,ppp0 \
        dalvik.vm.heapsize=64m \
        persist.service.usb.setting=0 \
-       dev.sfbootcomplete=0
+       dev.sfbootcomplete=0 \
+       persist.sys.vold.switchexternal=1
 
 # enable Google-specific location features,
 # like NetworkLocationProvider and LocationCollector