docs/meson: replace plaintext url with a link

Reviewed-by: Dylan Baker <dylan@pnwbakers.com>
Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>

docs/meson.html

@@ -82,9 +82,9 @@ Without arguments, it will produce libGL.so and/or several other libraries
 depending on the options you have chosen. Later, if you want to rebuild for a
 different configuration, you should run <code>ninja clean</code> before
 changing the configuration, or create a new out of tree build directory for
-each configuration you want to build.
-
-http://mesonbuild.com/Using-multiple-build-directories.html
+each configuration you want to build
+<a href="http://mesonbuild.com/Using-multiple-build-directories.html">as
+recommended in the documentation</a>
 </p>
 
 <dl>