WIP: use new headers for musl build

Author: bachp

ci/docker/x86_64-unknown-linux-musl/Dockerfile

@@ -9,12 +9,12 @@ RUN curl https://www.musl-libc.org/releases/musl-1.1.19.tar.gz | \
     ./configure --prefix=/musl-x86_64 && \
     make install -j4 && \
     cd .. && \
-    rm -rf musl-1.1.19 && \
+    rm -rf musl-1.1.19
 # Install linux kernel headers sanitized for use with musl
-    curl -L  https://github.com/sabotage-linux/kernel-headers/archive/v3.12.6-5.tar.gz | \
+RUN curl -L  https://github.com/bachp/kernel-headers/archive/v3.12.6-6.tar.gz | \
     tar xzf - && \
-    cd kernel-headers-3.12.6-5 && \
+    cd kernel-headers-3.12.6-6 && \
     make ARCH=x86_64 prefix=/musl-x86_64 install -j4 && \
     cd .. && \
-    rm -rf kernel-headers-3.12.6-5
+    rm -rf kernel-headers-3.12.6-6
 ENV PATH=$PATH:/musl-x86_64/bin:/rust/bin