Split out common qemu code used for lv2 here

Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com>

classes/qemu-ext.bbclass

@@ -0,0 +1,22 @@
+inherit qemu
+
+DEPENDS += "qemu-native"
+
+# slightly reworked qemu_run_binary: qemu.bbclass expects binary in sysroot but
+# our binary is not (yet) installed
+# ${@qemu_run_binary_local(d, '$D', '/usr/bin/test_app')} [test_app arguments]
+#
+def qemu_run_binary_local(data, rootfs_path, binary):
+    qemu_binary = qemu_target_binary(data)
+    if qemu_binary == "qemu-allarch":
+        qemu_binary = "qemuwrapper"
+
+    libdir = rootfs_path + data.getVar("libdir", False)
+    base_libdir = rootfs_path + data.getVar("base_libdir", False)
+    qemu_options = data.getVar("QEMU_OPTIONS", True)
+
+    return "PSEUDO_UNLOAD=1 " + qemu_binary + " " + qemu_options + " -L " + rootfs_path\
+            + " -E LD_LIBRARY_PATH=" + libdir + ":" + base_libdir + " "\
+            + binary
+
+