WindCharger: Fixed u-boot build race condition.

The .depend file in the windcharger board's implementation dir looks for
a file that is autogenerated by the root Makefile:


This file can exist without having been completely created by the root
Makefile.  This change forces the u-boot's main dependency array (built
by the root Makefile) to wait for the "version" directive to complete first.

This was tested using abf@ suggestion to splice in a sleep 5s in the
version directive while running a parallel make.  This change resulted
in parallel makes completing successfully every time.

Change-Id: I23448f9ae07f538ffffb48cda7ba6cf4adf8f7d3
1 file changed