shio: Bump aom from 3.8.2 to 3.9.0 (#21)

[CHANGELOG](https://aomedia.googlesource.com/aom/+/refs/tags/v3.9.0/CHANGELOG)

Co-authored-by: bump[bot] <bump[bot]@shio.solutions>

build/Dockerfile

@@ -127,9 +127,9 @@ RUN sed -i 's/-lvmaf /-lvmaf -lstdc++ /' /usr/local/lib/pkgconfig/libvmaf.pc
 # bump: aom after cd build && ./hashupdate Dockerfile AOM $LATEST
 # bump: aom after COMMIT=$(git ls-remote https://aomedia.googlesource.com/aom v$LATEST^{} | awk '{print $1}') && sed -i -E "s/^ARG AOM_COMMIT=.*/ARG AOM_COMMIT=$COMMIT/" build/Dockerfile
 # bump: aom link "CHANGELOG" https://aomedia.googlesource.com/aom/+/refs/tags/v$LATEST/CHANGELOG
-ARG AOM_VERSION=3.8.2
+ARG AOM_VERSION=3.9.0
 ARG AOM_URL="https://aomedia.googlesource.com/aom"
-ARG AOM_COMMIT=615b5f541e4434aebd993036bc97ebc1a77ebc25
+ARG AOM_COMMIT=6cab58c3925e0f4138e15a4ed510161ea83b6db1
 RUN git clone --depth 1 --branch v$AOM_VERSION "$AOM_URL"
 RUN cd aom && test $(git rev-parse HEAD) = $AOM_COMMIT
 RUN \