Add step for binutils build in cross-arm{64}-alpine (#695)

Author: am11

src/ubuntu/22.04/cross/arm-alpine/Dockerfile

@@ -1,3 +1,22 @@
 FROM mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-22.04-crossdeps
 
+RUN cd /tmp \
+    && wget https://ftp.gnu.org/gnu/binutils/binutils-2.39.tar.gz \
+    && tar -xf binutils-2.39.tar.gz \
+    && cd binutils-2.39 \
+    && ./configure \
+       --disable-werror \
+       --target=armv7-alpine-linux-musl \
+       --prefix=/usr \
+       --libdir=/lib \
+       --disable-multilib \
+       --with-sysroot=armv7-alpine-linux-musl \
+       --enable-gold=yes \
+       --enable-plugins=yes \
+       --program-prefix=armv7-alpine-linux-musl- \
+    && make \
+    && make install \
+    && cd .. \
+    && rm -r *
+
 ADD rootfs.arm.tar crossrootfs

src/ubuntu/22.04/cross/arm64-alpine/Dockerfile

@@ -1,3 +1,22 @@
 FROM mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-22.04-crossdeps
 
+RUN cd /tmp \
+    && wget https://ftp.gnu.org/gnu/binutils/binutils-2.39.tar.gz \
+    && tar -xf binutils-2.39.tar.gz \
+    && cd binutils-2.39 \
+    && ./configure \
+       --disable-werror \
+       --target=aarch64-alpine-linux-musl \
+       --prefix=/usr \
+       --libdir=/lib \
+       --disable-multilib \
+       --with-sysroot=aarch64-alpine-linux-musl \
+       --enable-gold=yes \
+       --enable-plugins=yes \
+       --program-prefix=aarch64-alpine-linux-musl- \
+    && make \
+    && make install \
+    && cd .. \
+    && rm -r *
+
 ADD rootfs.arm64.tar crossrootfs

src/ubuntu/22.04/crossdeps/Dockerfile

@@ -27,6 +27,7 @@ RUN apt-get update \
         qemu \
         qemu-user-static \
         rpm2cpio \
+        texinfo \
         libbz2-dev \
         libz-dev \
         liblzma-dev \