ffmpeg: enable mp3 encoding

https://manual.audacityteam.org/man/lame_legal_issues.html

media-video/ffmpeg/ffmpeg-4.2.2.recipe

@@ -6,7 +6,7 @@ HOMEPAGE="https://ffmpeg.org/"
 COPYRIGHT="2000-2003 Fabrice Bellard
 	2003-2019 the FFmpeg developers"
 LICENSE="GNU LGPL v3"
-REVISION="2"
+REVISION="3"
 SOURCE_URI="https://ffmpeg.org/releases/ffmpeg-$portVersion.tar.xz"
 CHECKSUM_SHA256="cb754255ab0ee2ea5f66f8850e1bd6ad5cac1cd855d0a2f4990fb8c668b0d29c"
 PATCHES="ffmpeg-$portVersion.patchset"
@@ -49,6 +49,7 @@ PROVIDES="
 REQUIRES="
 	haiku$secondaryArchSuffix
 	lib:libbz2$secondaryArchSuffix
+	lib:libmp3lame$secondaryArchSuffix
 	lib:libogg$secondaryArchSuffix
 	lib:libspeex$secondaryArchSuffix
 	lib:libssl$secondaryArchSuffix
@@ -141,6 +142,7 @@ fi
 BUILD_REQUIRES="
 	haiku${secondaryArchSuffix}_devel
 	devel:libbz2$secondaryArchSuffix
+	devel:libmp3lame$secondaryArchSuffix
 	devel:libogg$secondaryArchSuffix
 	devel:libsdl2$secondaryArchSuffix
 	devel:libspeex$secondaryArchSuffix
@@ -245,6 +247,7 @@ BUILD()
 		--enable-libvorbis \
 		--enable-libspeex \
 		--enable-libtheora \
+		--enable-libmp3lame \
 		$extraArgs
 
 	make $jobArgs