linux-user/elfload: Fully initialize struct target_elf_prpsinfo

Fixes Coverity CID: 1534962
Fixes: 243c4706625 ("linux-user/elfload: Write corefile elf header in one block")
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
1 file changed