LoongArch: Add testcases for new relocate types.

LoongArch: Add testcases for new relocate types.

  gas/testsuite/gas/all/
    gas.exp
  gas/testsuite/gas/loongarch/
    jmp_op.d
    jmp_op.s
    macro_op.d
    macro_op.s
    macro_op_32.d
    macro_op_32.s
    macro_op_large_abs.d
    macro_op_large_abs.s
    macro_op_large_pc.d
    macro_op_large_pc.s
    reloc.d
    reloc.s

  ld/testsuite/ld-elf/
    pr26936.d
    shared.exp
  ld/testsuite/ld-loongarch-elf/
    attr-ifunc-4.c
    attr-ifunc-4.out
    disas-jirl.d
    ifunc.exp
    jmp_op.d
    jmp_op.s
    libnopic-global.s
    macro_op.d
    macro_op.s
    macro_op_32.d
    macro_op_32.s
    nopic-global-so.rd
    nopic-global-so.sd
    nopic-global.out
    nopic-global.s
    nopic-global.sd
    nopic-global.xd
    nopic-local.out
    nopic-local.rd
    nopic-local.s
    nopic-local.sd
    nopic-local.xd
    nopic-weak-global-so.rd
    nopic-weak-global-so.sd
    nopic-weak-global.out
    nopic-weak-global.s
    nopic-weak-global.sd
    nopic-weak-global.xd
    nopic-weak-local.out
    nopic-weak-local.rd
    nopic-weak-local.s
    nopic-weak-local.sd
    nopic-weak-local.xd
    pic.exp
    pic.ld