Make the glew package build and install GLEWmx.

GLEWmx is the multi-context version of GLEW.
---
 src/glew-test.c |    9 +++++++++
 src/glew.mk     |   24 ++++++++++++++++++++++++
 2 files changed, 33 insertions(+)

1 files changed, 9 insertions, 0 deletions

diff --git a/src/glew-test.c b/src/glew-test.c
index 05db910..e37a520 100644
--- a/src/glew-test.c
+++ b/src/glew-test.c
@@ -4,6 +4,15 @@
 #include <stdio.h>
 #include <GL/glew.h>
 
+#ifdef GLEW_MX
+/* We are using the multi-context variant of libGLEW */
+GLEWContext glew_context;
+GLEWContext* glewGetContext()
+{
+    return &glew_context;
+}
+#endif
+
 int main(int argc, char *argv[])
 {
     GLenum err;