Handle '\t' in gdb instruction output

[wcampbell0x2a]

For instance on the esp32-c3:

  0x42030192             ret
  0x42030194             auipc\tra,0xffffd
  0x42030198             jalr\t792(ra) # 0x4202d4ac
  0x4203019c             addi\tsp,sp,-16
  0x4203019e             sw\tra,12(sp)
>>0x420301a0             sw\ts0,8(sp)
  0x420301a2             addi\ts0,sp,16
  0x420301a4             lui\ta1,0x3fca7
  0x420301a8             lw\ta2,52(a1) # 0x3fca7034
  0x420301ac             sw\ta2,-12(s0)