rust-hello-world: test at runtime

This adds a smoke check for whether the rust toolchain actually
produces working executables across a range of architectures.

(From OE-Core rev: 14bb638b0df7acfa6aa89abf4625357f8cde886b)

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/testimage.bbclass

@@ -61,7 +61,7 @@ BASICTESTSUITE = "\
     ping date df ssh scp python perl gi ptest parselogs \
     logrotate connman systemd oe_syslog pam stap ldd xorg \
     kernelmodule gcc buildcpio buildlzip buildgalculator \
-    dnf rpm opkg apt weston go"
+    dnf rpm opkg apt weston go rust"
 
 DEFAULT_TEST_SUITES = "${BASICTESTSUITE}"