Added libvshadow to libyal project configuration (google#5698)

Author: joachimmetz

projects/libyal/Dockerfile

@@ -49,6 +49,7 @@ RUN git clone --depth 1 https://github.com/libyal/libfsxfs.git libfsxfs
 RUN git clone --depth 1 https://github.com/libyal/libbde.git libbde
 RUN git clone --depth 1 https://github.com/libyal/libluksde.git libluksde
 RUN git clone --depth 1 https://github.com/libyal/libvsgpt.git libvsgpt
+RUN git clone --depth 1 https://github.com/libyal/libvshadow.git libvshadow
 RUN git clone --depth 1 https://github.com/libyal/libvslvm.git libvslvm
 RUN git clone --depth 1 https://github.com/libyal/libvsmbr.git libvsmbr