stress-ng: create a symlink for /usr/bin/stress

In commit 72641004, stress-ng was made to provide the stress package,
because it's backwards compatible with the old stress command. But it
doesn't actually provide /usr/bin/stress which is what other recipes
depending on stress will expect.

Symlink /usr/bin/stress to stress-ng so that it actually becomes
a drop-in replacement for stress.

(From OE-Core rev: 5d8c4ea26a48135c3405afac0372e4e062a7339a)

Signed-off-by: Dan Callaghan <dan.callaghan@opengear.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/stress-ng/stress-ng_0.11.15.bb

@@ -22,5 +22,6 @@ inherit bash-completion
 
 do_install() {
     oe_runmake DESTDIR=${D} install
+    ln -s stress-ng ${D}${bindir}/stress
 }