[Qemu-devel] linux-user: add option to intercept execve() syscalls

[Joel Holdsworth]

This patch-set includes Peter Angelatos's previous patch-set [1] and
adds code to pass arguments for setting the environment variables,
passing the interpeter prefix, and passing the strace option.

Changes since v1:
 - Fixed argument array overflows.

[1] https://patchwork.ozlabs.org/patch/582756/