Update binutils version

This is needed to handle R_X86_64_REX_GOTPCRELX relocations.

Author: nikic

src/ci/docker/host-x86_64/dist-x86_64-linux/build-binutils.sh

@@ -4,14 +4,16 @@ set -ex
 
 source shared.sh
 
-curl https://ftp.gnu.org/gnu/binutils/binutils-2.25.1.tar.bz2 | tar xfj -
+VERSION=2.26.1
+
+curl https://ftp.gnu.org/gnu/binutils/binutils-$VERSION.tar.bz2 | tar xfj -
 
 mkdir binutils-build
 cd binutils-build
-hide_output ../binutils-2.25.1/configure --prefix=/rustroot
+hide_output ../binutils-$VERSION/configure --prefix=/rustroot
 hide_output make -j10
 hide_output make install
 
 cd ..
 rm -rf binutils-build
-rm -rf binutils-2.25.1
+rm -rf binutils-$VERSION