fix chromium path.

.m1k1o/chromium/Dockerfile.arm

@@ -5,6 +5,7 @@ FROM $BASE_IMAGE
 # install neko chromium
 RUN set -eux; apt-get update; \
     apt-get install -y --no-install-recommends unzip chromium-browser openbox libwidevinecdm0; \
+    ln -s /usr/bin/chromium-browser /usr/bin/chromium; \
     #
     # clean up
     apt-get --purge autoremove -y unzip; \