ci: Add installation of pre-compiled OpenSSL NDK libraries

Change-Id: I059c8515fcfe8ee58a34d20c66b182802e1ce6c9
diff --git a/.vagrant/Vagrantfile b/.vagrant/Vagrantfile
index 3b59f65..92ac7e6 100644
--- a/.vagrant/Vagrantfile
+++ b/.vagrant/Vagrantfile
@@ -30,6 +30,11 @@
 
 echo sdk.dir=`pwd`/android-sdk-linux > local.properties
 echo ndk.dir=`pwd`/crystax-ndk-$CRYSTAX_NDK_VERSION >> local.properties
+
+cd crystax-ndk-$CRYSTAX_NDK_VERSION/sources
+curl -L -o openssl.tar.gz https://github.com/named-data-mobile/crystax-prebuilt-openssl/archive/crystax-$CRYSTAX_NDK_VERSION.tar.gz
+tar zx --strip-components 1 -C openssl -f openssl.tar.gz
+rm openssl.tar.gz
 SCRIPT
 
 Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|