docs: add more MinGW prerequisite tips
Provided by Charles Huber on the mesa-users list.
diff --git a/docs/install.html b/docs/install.html
index 07e38bf..0d5bab2 100644
--- a/docs/install.html
+++ b/docs/install.html
@@ -38,9 +38,17 @@
<li>lex / yacc - for building the GLSL compiler.
On Linux systems, flex and bison are used.
Versions 2.5.35 and 2.4.1, respectively, (or later) should work.
+<br>
+<br>
+On Windows with MinGW, install flex and bison with:
+<pre>mingw-get install msys-flex msys-bison</pre>
</li>
<li>python - Python is needed for building the Gallium components.
Version 2.6.4 or later should work.
+<br>
+<br>
+To build OpenGL ES 1.1 and 2.0 you'll also need
+<a href="http://xmlsoft.org/sources/win32/python/libxml2-python-2.7.7.win32-py2.7.exe">libxml2-python</a>.
</li>
</ul>