Specify the full path to atree for the windows.atree. DO NOT MERGE.

Somehow the build server doesn't automatically find atree.
In a future CL this should be amended to pass the proper
OUT_HOST_EXECUTABLE, being careful that it points to the
host/linux dir, not the current Windows one.

Cherry-pick from master b2b5921

Change-Id: I13e532cdc4c0839b6fd7f2a3a149725940a02734

build/tools/patch_windows_sdk.sh

@@ -70,7 +70,8 @@ fi
 
 
 # Invoke atree to copy the files
-atree -f ${TOPDIR}development/build/sdk-windows-x86.atree \
+# TODO: pass down OUT_HOST_EXECUTABLE to get the right bin/atree directory
+${TOPDIR}out/host/linux-x86/bin/atree -f ${TOPDIR}development/build/sdk-windows-x86.atree \
       -I $WIN_OUT_DIR/host/windows-x86 \
       -I ${TOPDIR:-.} \
       -o $TEMP_SDK_DIR