add support for mips devices

[KonkaTV514]

This is the file and readelf of my device's built-in busybox:

0|u0_a990@localhost: ~/jq $ file busybox
busybox: ELF 32-bit MSB executable, MIPS, MIPS32 version 1 (SYSV), dynamically linked, interpreter /lib/ld-uClibc.so.0, stripped                            0|u0_a990@localhost: ~/jq $ readelf -h busybox
  ELF Header:
  Magic:   7f 45 4c 46 01 02 01 00 00 00 00 00 00 00 00 00
  Class:                             ELF32
  Data:                              2's complement, big endian
  Version:                           1 (current)
  OS/ABI:                            UNIX - System V
  ABI Version:                       0
  Type:                              EXEC (Executable file)
  Machine:                           mips
  Version:                           0x1
  Entry point address:               0x4037f0
  Start of program headers:          52 (bytes into file)
  Start of section headers:          181600 (bytes into file)
  Flags:                             0x50001007
  Size of this header:               52 (bytes)
  Size of program headers:           32 (bytes)
  Number of program headers:         8
  Size of section headers:           40 (bytes)
  Number of section headers:         30
  Section header string table index: 29

/proc/cpuinfo:

system type             : 968488X41
machine                 : Unknown
processor               : 0
cpu model               : Broadcom BMIPS4350 V8.1
BogoMIPS                : 598.01
wait instruction        : yes
microsecond timers      : yes
tlb_entries             : 32
extra interrupt vector  : no
hardware watchpoint     : no
isa                     : mips1 mips2 mips32r1
ASEs implemented        :
shadow register sets    : 1
kscratch registers      : 0
package                 : 0
core                    : 0
VCED exceptions         : not available
VCEI exceptions         : not available

processor               : 1
cpu model               : Broadcom BMIPS4350 V8.1
BogoMIPS                : 606.20
wait instruction        : yes
microsecond timers      : yes
tlb_entries             : 32
extra interrupt vector  : no
hardware watchpoint     : no
isa                     : mips1 mips2 mips32r1
ASEs implemented        :
shadow register sets    : 1
kscratch registers      : 0
package                 : 0
core                    : 0
VCED exceptions         : not available
VCEI exceptions         : not available