tests: Move all test programs to a subdirectory

libswscale/tests/.gitignore

@@ -0,0 +1,2 @@
+/colorspace
+/swscale

libswscale/tests/colorspace.c

@@ -23,10 +23,11 @@
 #include <stdlib.h>
 #include <inttypes.h>
 
-#include "swscale.h"
-#include "rgb2rgb.h"
 #include "libavutil/mem.h"
 
+#include "libswscale/rgb2rgb.h"
+#include "libswscale/swscale.h"
+
 #define SIZE    1000
 #define srcByte 0x55
 #define dstByte 0xBB

libswscale/tests/swscale.c

@@ -31,7 +31,8 @@
 #include "libavutil/crc.h"
 #include "libavutil/pixdesc.h"
 #include "libavutil/lfg.h"
-#include "swscale.h"
+
+#include "libswscale/swscale.h"
 
 /* HACK Duplicated from swscale_internal.h.
  * Should be removed when a cleaner pixel format system exists. */