Firs this fixes a cp/rm errors that were logged when building the Windows SDK.
There errors happens because the secondary sdk/tools/patch_windows_sdk.sh
was run twice.
Next the shell script is changed to make any error fatal and actually
break the build, like it should.
In the makefile, merge Ying's fix to correctly pass showcommands.
Change-Id: I97bbe46d705c6683e31bb701222efe6f9da71d70
cedf2ba818