configure: add missing optional deps on gcrypt and openssl to the hls muxer

Should fix ticket #6738

Signed-off-by: James Almer <jamrial@gmail.com>

configure

@@ -3031,6 +3031,7 @@ fifo_muxer_deps="threads"
 flac_demuxer_select="flac_parser"
 hds_muxer_select="flv_muxer"
 hls_muxer_select="mpegts_muxer"
+hls_muxer_suggest="gcrypt openssl"
 image2_alias_pix_demuxer_select="image2_demuxer"
 image2_brender_pix_demuxer_select="image2_demuxer"
 ipod_muxer_select="mov_muxer"