[armadillo] update to 4.550.2

[rcurtin]

commit 2b8ec9a393d79ee7b0a4aa59dd83725ae8ff26bf
Author: Ryan Curtin <gth671b at mail.gatech.edu>
Date:   Fri Dec 5 21:22:29 2014 -0500

    update to 4.550.2

 .gitignore |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/.gitignore b/.gitignore
index d686dfd..fd28806 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 clog
 /armadillo-4.550.0.tar.gz
+/armadillo-4.550.2.tar.gz