Bugfixed delete build folder

Signed-off-by: Dimitris Zlatanidis <d.zlatanidis@gmail.com>

ChangeLog.txt

@@ -1,3 +1,7 @@
+3.4.2 - 23/01/2019
+Fixed:
+- Bugfixed delete build folder in network option
+
 3.4.1 - 23/01/2019
 Fixed:
 - Fix manpage

slpkg/sbo/network.py

@@ -233,7 +233,7 @@ class SBoNetwork(object):
         if not find_package(self.prgnam, self.meta.pkg_path):
             self.build()
             self.install()
-            delete(self.build_folder)
+            delete_folder(self.build_folder)
             raise SystemExit()
         else:
             self.msg.template(78)