[gtk] docs: Link to the compiler requirements wiki page

[Emmanuele Bassi <ebassi src gnome org>]

commit 453a50dc95945430d0a4e3c4b40417854fdcce29
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Thu Feb 8 14:10:20 2018 +0000

    docs: Link to the compiler requirements wiki page
    
    From the README file.

 README.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/README.md b/README.md
index 0245538fc1..2a523d0f0a 100644
--- a/README.md
+++ b/README.md
@@ -34,8 +34,8 @@ Building and installing
 
 In order to build GTK+ you will need:
 
-  - a C99 compatible compiler
-  - Python 3
+  - [a C99 compatible compiler](https://wiki.gnome.org/Projects/GLib/CompilerRequirements)
+  - [Python 3](https://www.python.org/)
   - [Meson](http://mesonbuild.com)
   - [Ninja](https://ninja-build.org)