devel/ignition-common: Move to FFmpeg 4

Fails to build with FFmpeg 6

PR:		270198
Approved by:	portmgr (blanket, build fix)
Sponsored by:	Blinkinblox

devel/ignition-common/Makefile

@@ -12,14 +12,14 @@ LICENSE=	APACHE20
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 BUILD_DEPENDS=	ignition-cmake==2:devel/ignition-cmake
-LIB_DEPENDS=	libavcodec.so:multimedia/ffmpeg \
+LIB_DEPENDS=	libavcodec.so.58:multimedia/ffmpeg4 \
 		libfreeimage.so:graphics/freeimage \
 		libgts.so:graphics/gts \
 		libtinyxml2.so:textproc/tinyxml2 \
 		libuuid.so:misc/e2fsprogs-libuuid \
 		libignition-math6.so:math/ignition-math
 
-USES=		cmake compiler:c++17-lang gnome pkgconfig
+USES=		cmake compiler:c++17-lang gnome localbase pkgconfig
 USE_GNOME=	glib20
 USE_LDCONFIG=	yes