icecc.bbclass: also use icecc for kernel modules compilation

(From OE-Core rev: 7da58c6fdaa8feef5ee5637dfb74912e7e4f5394)

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/icecc.bbclass

@@ -211,6 +211,10 @@ do_compile_prepend() {
     set_icecc_env
 }
 
+do_compile_kernelmodules_prepend() {
+    set_icecc_env
+}
+
 #do_install_prepend() {
 #    set_icecc_env
 #}