Update to newer crossbuild

Author: ethomson

Dockerfile.linux

@@ -1,9 +1,9 @@
-FROM bording/crossbuild
+FROM kmturley/crossbuild
 ARG ARCH='amd64'
 ENV CROSS_TRIPLE=${ARCH}
 RUN apt update && apt -y install pkg-config
 
 WORKDIR /nativebinaries
 COPY . /nativebinaries/
 
-CMD ["/bin/bash", "-c", "./build.libgit2.sh"]
+CMD ["/bin/bash", "-c", "./build.libgit2.sh"]