configure: Show whether the safe bitstream reader is enabled

Signed-off-by: Martin Storsjö <martin@martin.st>

configure

@@ -3205,6 +3205,7 @@ echo "postprocessing support    ${postproc-no}"
 echo "new filter support        ${avfilter-no}"
 echo "network support           ${network-no}"
 echo "threading support         ${thread_type-no}"
+echo "safe bitstream reader     ${safe_bitstream_reader-no}"
 echo "SDL support               ${sdl-no}"
 echo "Sun medialib support      ${mlib-no}"
 echo "libdxva2 enabled          ${dxva2-no}"