Currently, when passing --with-binutils-src, binutils is built in the source tree. That leads to conflicting targets when compiling for different architectures (ex: amd64 on the host, and riscv64 or aarch64 for the target) from the same jdk source tree.

The simplest solution is to build binutils out-of-tree and into the build/<target>/binutils folder. These out-of-tree builds are already supported by binutils and only require some changes in the way we invoke the binutils/configure command.