Allow symlinks to device or vendor tree in envsetup.sh.

Change-Id: I1190a0b1c84fa17b3692427eb6071ffbe84bc529
diff --git a/envsetup.sh b/envsetup.sh
index 34b52e5..6188f26 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -1459,8 +1459,8 @@
 fi
 
 # Execute the contents of any vendorsetup.sh files we can find.
-for f in `test -d device && find device -maxdepth 4 -name 'vendorsetup.sh' 2> /dev/null` \
-         `test -d vendor && find vendor -maxdepth 4 -name 'vendorsetup.sh' 2> /dev/null`
+for f in `test -d device && find -L device -maxdepth 4 -name 'vendorsetup.sh' 2> /dev/null` \
+         `test -d vendor && find -L vendor -maxdepth 4 -name 'vendorsetup.sh' 2> /dev/null`
 do
     echo "including $f"
     . $f