jni: Revert dependency on CrystaX 10.1.0 and fixes for new versions of NFD and ndn-cxx

The new CrystaX release has (yet unknown) issue that prevents code from
working properly

Change-Id: I5c34dc12ea653c7b7ec694640b5d0ecd6648b1d5
diff --git a/.jenkins.d/10-get-ndk.sh b/.jenkins.d/10-get-ndk.sh
index b6ed35d..5729869 100755
--- a/.jenkins.d/10-get-ndk.sh
+++ b/.jenkins.d/10-get-ndk.sh
@@ -3,7 +3,7 @@
 set -x
 
 URL=https://www.crystax.net/download/
-NDK=crystax-ndk-10.2.1
+NDK=crystax-ndk-10.1.0
 
 NDK_FILE="$NDK-linux-x86_64.tar.bz2"