clean_ffmpeg.sh: Add missing libavutil/ffmath.h

Also update sources with the regenerated and reuploaded tarball.

clean_ffmpeg.sh

@@ -60,6 +60,7 @@ header_files="  libavutil/x86/asm.h \
                 libavutil/cpu_internal.h \
                 libavutil/cpu.h \
                 libavutil/dynarray.h \
+                libavutil/ffmath.h \
                 libavutil/float_dsp.h \
                 libavutil/fixed_dsp.h \
                 libavutil/internal.h \

sources

@@ -1 +1 @@
-SHA512 (qtwebengine-opensource-src-5.9.0-clean.tar.xz) = ee0eeaa81302c609ea35df3bdffa2099ce2bbf90bb24d40da2153c0cf4a3af1a80a5e02d1a106ec4e9064b3c115557991246417521150b497b10fcde10c1db22
+SHA512 (qtwebengine-opensource-src-5.9.0-clean.tar.xz) = 1ad92d3fb1491f5396e39bc6e0905e019959b420c77c6e3056a032b08b3c6d1c313f8cb2a5e0aad440ae8fc6442b966a7c7996dc2e759dd8c1632d8e027d6d50