GPU_shader automatically uses new matrix values

Whether used from Gawain or from traditional OpenGL draw methods.

TODO: make sure we bind matrices only once per shader change.

Part of T49450

source/blender/gpu/intern/gpu_shader.c

@@ -39,6 +39,7 @@
 #include "GPU_shader.h"
 #include "GPU_uniformbuffer.h"
 #include "GPU_texture.h"
+#include "GPU_matrix.h"
 
 #include "gpu_shader_private.h"
 
@@ -505,6 +506,7 @@ void GPU_shader_bind(GPUShader *shader)
 	BLI_assert(shader && shader->program);
 
 	glUseProgram(shader->program);
+	gpuBindMatrices(shader->program);
 }
 
 void GPU_shader_unbind(void)