* emulparams/elf32bmip.sh: Make _gp hidden.
* emulparams/elf32bmipn32-defs.sh: Likewise.
* emulparams/elf32mipswindiss.sh: Likewise.
* scripttempl/mips.sc: Likewise.
ld/testsuite/
* ld-mips-elf/rel32-o32.d: Adjust section VMAs after the removal
of _gp from the global scope.
* ld-mips-elf/rel32-n32.d: Likewise.
* ld-mips-elf/rel64.d: Likewise.