[infer][PR] Also mention the code name of the Debian versions

Summary: Closes https://github.com/facebook/infer/pull/663

Differential Revision: D5217433

Pulled By: jvillard

fbshipit-source-id: 04d99d5

INSTALL.md

@@ -102,7 +102,7 @@ sudo make install
 Here are instructions on how to install the dependencies needed to
 compile Infer on a few Linux distributions.
 
-### Debian 7 and Ubuntu 14.04 LTS
+### Debian 7 (Wheezy) and Ubuntu 14.04 LTS
 
 ```sh
 sudo apt-get update
@@ -123,7 +123,7 @@ sudo apt-get install -y \
   zlib1g-dev
 ```
 
-### Debian 8
+### Debian 8 (Jessie)
 
 ```sh
 sudo apt install -y \