[Enhancement] Trace log needs improving

Created by: jrrk

ariane produces a tracelog trace_core_00_0.dasm, which may be converted to trace_core_00_0.dis using spike-dasm. I have found that the trace log disagrees with the disassembled binary in the sense that compressed instructions are shown post conversion:

disassembly:

0000000040000382 <_init>:
    40000382:   00001517                auipc   a0,0x1
    40000386:   2c650513                addi    a0,a0,710 # 40001648 <_bss>
    4000038a:   00001617                auipc   a2,0x1
    4000038e:   30e60613                addi    a2,a2,782 # 40001698 <_end>
    40000392:   1101                    addi    sp,sp,-32
    40000394:   8e09                    sub     a2,a2,a0

trace log:

88 0x40000382 M (0x00001517) auipc   a0, 0x1
89 0x40000386 M (0x2c650513) addi    a0, a0, 710
90 0x4000038a M (0x00001617) auipc   a2, 0x1
91 0x4000038e M (0x30e60613) addi    a2, a2, 782
92 0x40000392 M (0xfe010113) addi    sp, sp, -32
93 0x40000394 M (0x40a60633) sub     a2, a2, a0

also sometimes the expanded instruction is < 0xFFFF leading to an ambiguity for poor humans to get confused by:

40000068:   6319                    lui     t1,0x6

becomes:

              65 0x40000068 M (0x00006337) lui     t1, 0x6

In addition the PC counter log appears misaligned to those not in the know because 32-bit instructions are apparently fetched with a PC increment of 2.