Fixing source tar.gz instead of hacking it here.

Dockerfile-eth

@@ -46,11 +46,9 @@ WORKDIR /home/xcompiler
 RUN git clone --recursive https://github.com/doublethinkco/webthree-umbrella.git
 
 # wget, untar and unzip the prebuilt cross-compiler.  Ignore non-zero return
-# code error caused by HTTPS re-direct to CDN.   Also flatten out the extra
-# level of indentation in the tar.gz file here.   Needs fixing at source.
+# code error caused by HTTPS re-direct to CDN.
 RUN wget ‐‐output-document=x-tools.tar.gz https://github.com/doublethinkco/webthree-umbrella-cross/releases/download/0.0.1/x-tools.tar.gz; exit 0
 RUN tar xvfz x-tools.tar.gz
-RUN mv x-tools/x-tools/arm-unknown-linux-gnueabi/ x-tools/arm-unknown-linux-gnueabi/
 
 # Use that cross-compiler to build the ARM executable
 WORKDIR /home/xcompiler/webthree-umbrella/cross-build/ethereum