avfilter/Makefile: Add missing colormap->framesync dependency

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavfilter/Makefile

@@ -240,7 +240,7 @@ OBJS-$(CONFIG_COLORKEY_OPENCL_FILTER)        += vf_colorkey_opencl.o opencl.o \
                                                 opencl/colorkey.o
 OBJS-$(CONFIG_COLORHOLD_FILTER)              += vf_colorkey.o
 OBJS-$(CONFIG_COLORLEVELS_FILTER)            += vf_colorlevels.o
-OBJS-$(CONFIG_COLORMAP_FILTER)               += vf_colormap.o
+OBJS-$(CONFIG_COLORMAP_FILTER)               += vf_colormap.o framesync.o
 OBJS-$(CONFIG_COLORMATRIX_FILTER)            += vf_colormatrix.o
 OBJS-$(CONFIG_COLORSPACE_FILTER)             += vf_colorspace.o colorspacedsp.o
 OBJS-$(CONFIG_COLORSPACE_CUDA_FILTER)        += vf_colorspace_cuda.o \