Work-around a subtility of the preprocessor and use " instead of <>.

This will break for the people with a linux/videodev2.h in srcdir or srcdir/modules/access but that's quite unlikely.
Closes #1238

configure.ac

@@ -2370,7 +2370,7 @@ then
   then
     AC_DEFINE_UNQUOTED(VIDEODEV2_H_FILE, "${with_videodev2}", [Location of videodev2.h])
   else
-    AC_DEFINE(VIDEODEV2_H_FILE, <linux/videodev2.h>, [Location of videodev2.h])
+    AC_DEFINE(VIDEODEV2_H_FILE, "linux/videodev2.h", [Location of videodev2.h])
   fi