Revert "waf-samba.bbclass: adapt to qemu.bbclass refactoring"

This reverts commit a8995fc3f352d83b4141f0ff7bbc3f13d0f2767f.

The patches for oe-core were re-worked. But I forgot to recall
this patch.

In fact, inheriting qemu is needed because it sets a clear barriar
for people to use qemu user mode. And the QEMU_OPTIONS settings
are also in qemu.bbclass.

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-networking/classes/waf-samba.bbclass

@@ -1,7 +1,7 @@
 # waf is a build system which is used by samba related project.
 # Obtain details from https://wiki.samba.org/index.php/Waf
 #
-inherit python3native
+inherit qemu python3native
 
 DEPENDS += "qemu-native libxslt-native docbook-xsl-stylesheets-native python3"
 
@@ -77,7 +77,7 @@ do_configure() {
     echo 'Checking uname release type: "${OLDEST_KERNEL}"' >> ${CROSS_ANSWERS}
     cat ${WAF_CROSS_ANSWERS_PATH}/cross-answers-${TARGET_ARCH}.txt >> ${CROSS_ANSWERS}
 
-    qemu_binary="${@oe.qemu.qemu_target_binary(d)}"
+    qemu_binary="${@qemu_target_binary(d)}"
     if [ "${qemu_binary}" = "qemu-allarch" ]; then
         qemu_binary="qemuwrapper"
     fi