libfdt: Test rw functions on more trees

[Jon Loeliger]

So, like, the other day David Gibson mumbled:
> At present, the testcases for read/write functions (setprop,
> del_property and del_node) are only invoked on the single
> asm-generated tree, not on any of the other tree images which should
> be equivalent.  The functions in question will (correctly) not work on
> the "unfinished" tree output from sw_tree1, but should work on most of
> the others.
> 
> This patch extends the run_tests script to invoke the r/w testcases on
> more example trees.  The testsuite still passes clean with this
> addition.
> 
> Signed-off-by: David Gibson <david at gibson.dropbear.id.au>

Applied.

Thanks,
jdl