renaming: Make names of the tools unique

Change-Id: I4bcc1844e8160f076fd886a6be56ab8d1fb15802
diff --git a/.gitignore b/.gitignore
index 410c804..db21ec6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -74,8 +74,8 @@
 
 # Tools
 tools/tlvdump
-tools/ndncatchunks
-tools/ndnputchunks
+tools/ndncatchunks3
+tools/ndnputchunks3
 
 # Examples
 examples/consumer