lsws: duplicate ff_log2_tab

libswscale uses the table but wasn't duplicating it like the rest of the libs.
This should fix compilation failures on msvc/icl after lavu stopped exporting
internal functions and tables.

Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libswscale/Makefile

@@ -15,6 +15,8 @@ OBJS = hscale_fast_bilinear.o                           \
        utils.o                                          \
        yuv2rgb.o                                        \
 
+OBJS-$(CONFIG_SHARED)        += log2_tab.o
+
 # Windows resource file
 SLIBOBJS-$(HAVE_GNU_WINDRES) += swscaleres.o
 

libswscale/log2_tab.c

@@ -0,0 +1 @@
+#include "libavutil/log2_tab.c"