make-bootstrap-tools.nix: Fix bzip2

Apparently our native bzip2 builds switched to using dynamic libraries at some point.

pkgs/stdenv/linux/make-bootstrap-tools-cross.nix

@@ -221,8 +221,7 @@ rec {
         # GCC has certain things built in statically. See
         # pkgs/stdenv/linux/default.nix for the details.
         cp -d ${isl}/lib/libisl*.so* $out/lib
-        # Also this is needed since bzip2 uses a custom build system
-        # for native builds but autoconf (via a patch) for cross builds
+
         cp -d ${bzip2.out}/lib/libbz2.so* $out/lib
 
         # Copy binutils.

pkgs/stdenv/linux/make-bootstrap-tools.nix

@@ -122,6 +122,8 @@ rec {
         cp -d ${zlib.out}/lib/libz.so* $out/lib
         cp -d ${libelf}/lib/libelf.so* $out/lib
 
+        cp -d ${bzip2.out}/lib/libbz2.so* $out/lib
+
         # Copy binutils.
         for i in as ld ar ranlib nm strip readelf objdump; do
           cp ${binutils.out}/bin/$i $out/bin