lib: make rendercopy.h an internal header

And move the public interfaces into intel_batchbuffer.[hc].

A bit messy since we are fairly inconsistent with our header #include
handling.

Also exclude rendercopy.h from the documentation.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

lib/rendercopy_gen6.c

@@ -1,8 +1,24 @@
+#include <assert.h>
+#include <stdlib.h>
+#include <sys/ioctl.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <getopt.h>
+#include "drm.h"
+#include "i915_drm.h"
+#include "drmtest.h"
+#include "intel_bufmgr.h"
+#include "intel_batchbuffer.h"
+#include "intel_gpu_tools.h"
 #include "rendercopy.h"
 #include "gen6_render.h"
 
-#include <assert.h>
-
 #define ALIGN(x, y) (((x) + (y)-1) & ~((y)-1))
 #define VERTEX_SIZE (3*4)