go: Fix reproducibility failures

We're seeing "cmd" static libs being sometimes present and sometimes not.
The issue depends whether BUILD == TARGET so they're present for qemux86-64
on x86-64 hosts but not for qemux86-64 on an aarch64 system.

Add an extra deletion to make the files consistent between the different
hosts.

(From OE-Core rev: 6e652835814c389a826ad2d262ee26c14dfb48b5)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/go/go-runtime.inc

@@ -50,6 +50,8 @@ do_install() {
 	rm -rf ${D}${libdir}/go/pkg/tool
 	rm -rf ${D}${libdir}/go/pkg/obj
 	rm -rf ${D}${libdir}/go/pkg/bootstrap
+	# the cmd directory is built for the native arch so if BUILD == TARGET
+	rm -rf ${D}${libdir}/go/pkg/${BUILD_GOTUPLE}/cmd
 	find src -mindepth 1 -maxdepth 1 -type d | while read srcdir; do
 		cp --preserve=mode,timestamps -R $srcdir ${D}${libdir}/go/src/
 	done