ndn-cxx, nfd: Bumping version of 0.2.0-rc2

nlsr: Bumping to the latest release

ndn-tlv-ping, ndn-traffic-generator, ndndump, repo-ng: Bumping ppa version to
force rebuild against the latest version of the library.
diff --git a/nfd/Makefile b/nfd/Makefile
index 64174a7..7a17939 100644
--- a/nfd/Makefile
+++ b/nfd/Makefile
@@ -2,13 +2,13 @@
 GIT_URL=https://github.com/named-data/NFD.git
 
 # Tag name or commit hash for checkout
-GIT_VERSION=b609f00cbe94cd59c6a0162bb8fde84be3a5dd79
+GIT_VERSION=NFD-0.2.0-rc2
 
 # Package name
 NAME=nfd
 
 # Package version
-VERSION=0.2.0~rc1.1
+VERSION=0.2.0~rc2
 
 # PPA version
 PPA_VERSION=1