avfilter/Makefile: add missing dependency for lut3d

lut3d requires framesync

libavfilter/Makefile

@@ -289,7 +289,7 @@ OBJS-$(CONFIG_LUMAKEY_FILTER)                += vf_lumakey.o
 OBJS-$(CONFIG_LUT1D_FILTER)                  += vf_lut3d.o
 OBJS-$(CONFIG_LUT_FILTER)                    += vf_lut.o
 OBJS-$(CONFIG_LUT2_FILTER)                   += vf_lut2.o framesync.o
-OBJS-$(CONFIG_LUT3D_FILTER)                  += vf_lut3d.o
+OBJS-$(CONFIG_LUT3D_FILTER)                  += vf_lut3d.o framesync.o
 OBJS-$(CONFIG_LUTRGB_FILTER)                 += vf_lut.o
 OBJS-$(CONFIG_LUTYUV_FILTER)                 += vf_lut.o
 OBJS-$(CONFIG_MASKEDCLAMP_FILTER)            += vf_maskedclamp.o framesync.o