Rename translation units containing main() to main.cpp

Also unify style of argv declaration

Change-Id: I1dcb8689b1cd38e042a0b1f05be7f98bd2d487ed
diff --git a/tools/ping/wscript b/tools/ping/wscript
index f0c5f5e..4b66c04 100644
--- a/tools/ping/wscript
+++ b/tools/ping/wscript
@@ -5,24 +5,24 @@
 
     bld.objects(
         target='ping-client-objects',
-        source=bld.path.ant_glob('client/*.cpp', excl='client/ndn-ping.cpp'),
+        source=bld.path.ant_glob('client/*.cpp', excl='client/main.cpp'),
         use='core-objects')
 
     bld.program(
         target='../../bin/ndnping',
         name='ndnping',
-        source='client/ndn-ping.cpp',
+        source='client/main.cpp',
         use='ping-client-objects')
 
     bld.objects(
         target='ping-server-objects',
-        source=bld.path.ant_glob('server/*.cpp', excl='server/ndn-ping-server.cpp'),
+        source=bld.path.ant_glob('server/*.cpp', excl='server/main.cpp'),
         use='core-objects')
 
     bld.program(
         target='../../bin/ndnpingserver',
         name='ndnpingserver',
-        source='server/ndn-ping-server.cpp',
+        source='server/main.cpp',
         use='ping-server-objects')
 
     ## (for unit tests)