* ld-mips-elf/jalx-2-main.s: New.
* ld-mips-elf/jalx-2.dd: New.
* ld-mips-elf/jalx-2-ex.s: New.
* ld-mips-elf/jalx-2-printf.s: New.
* ld-mips-elf/mips-elf.exp: Run new test.
Please make the .dd output less susceptible to things like the number
of sections, size of program headers, etc. One way is to use a linker
script to place each section at a nice round address. Another is to
".*" out the addresses and instruction encodings and just reply on
the symbolic part of the disassembly. I think the former's better
here. There are quite a few existing examples.