update release making script to use the new build system

Summary:
public
Also clarify that you only need the autotools when building from non-release
trees.

Reviewed By: akotulski

Differential Revision: D2773461

fb-gh-sync-id: 031f814

INSTALL.md

@@ -22,13 +22,13 @@ is required to be able to [use the
 release](http://fbinfer.com/docs/getting-started.html) (faster), or to
 compile everything from source (see the end of this document).
 
-- autoconf >= 2.63 and automake >= 1.11.1
 - opam >= 1.2.0 (instructions [here](https://opam.ocaml.org/doc/Install.html#OSX))
 - Python 2.7
 - Java (only needed for the Java analysis)
 - clang in Xcode command line tools. You can install them with the command
   `xcode-select --install` (only needed for the C/Objective-C analysis)
 - Xcode >= 6.1 (only needed for the C/Objective-C analysis)
+- autoconf >= 2.63 and automake >= 1.11.1 (if building from git)
 
 You can install some of these dependencies using
 [Homebrew](http://brew.sh/):
@@ -46,11 +46,11 @@ is required to be able to [use the
 release](http://fbinfer.com/docs/getting-started.html) (faster), or to
 compile everything from source (see the end of this document).
 
-- autoconf >= 2.63 and automake >= 1.11.1
-- gcc >= 4.7.2 or clang >= 3.1 (only needed for the C/Objective-C analysis)
 - opam >= 1.2.0
 - Python 2.7
 - Java (only needed for the Java analysis)
+- gcc >= 4.7.2 or clang >= 3.1 (only needed for the C/Objective-C analysis)
+- autoconf >= 2.63 and automake >= 1.11.1 (if building from git)
 
 See also the distro-specific instructions for Ubuntu and Debian below.