perf annotate: Align source and offset lines

Align source with offset lines, which are more advanced, because of the
address column.

  Before:
         :      static void *worker_thread(void *__tdata)
         :      {
    0.00 :        48a971:       push   %rbp
    0.00 :        48a972:       mov    %rsp,%rbp
    0.00 :        48a975:       sub    $0x30,%rsp
    0.00 :        48a979:       mov    %rdi,-0x28(%rbp)
    0.00 :        48a97d:       mov    %fs:0x28,%rax
    0.00 :        48a986:       mov    %rax,-0x8(%rbp)
    0.00 :        48a98a:       xor    %eax,%eax
         :              struct thread_data *td = __tdata;
    0.00 :        48a98c:       mov    -0x28(%rbp),%rax
    0.00 :        48a990:       mov    %rax,-0x10(%rbp)
         :              int m = 0, i;
    0.00 :        48a994:       movl   $0x0,-0x1c(%rbp)
         :              int ret;
         :
         :              for (i = 0; i < loops; i++) {
    0.00 :        48a99b:       movl   $0x0,-0x18(%rbp)

  After:
         :              static void *worker_thread(void *__tdata)
         :              {
    0.00 :       48a971:       push   %rbp
    0.00 :       48a972:       mov    %rsp,%rbp
    0.00 :       48a975:       sub    $0x30,%rsp
    0.00 :       48a979:       mov    %rdi,-0x28(%rbp)
    0.00 :       48a97d:       mov    %fs:0x28,%rax
    0.00 :       48a986:       mov    %rax,-0x8(%rbp)
    0.00 :       48a98a:       xor    %eax,%eax
         :                      struct thread_data *td = __tdata;
    0.00 :       48a98c:       mov    -0x28(%rbp),%rax
    0.00 :       48a990:       mov    %rax,-0x10(%rbp)
         :                      int m = 0, i;
    0.00 :       48a994:       movl   $0x0,-0x1c(%rbp)
         :                      int ret;
         :
         :                      for (i = 0; i < loops; i++) {
    0.00 :       48a99b:       movl   $0x0,-0x18(%rbp)

It makes bigger different when displaying script sources, where the
comment lines looks oddly shifted from the lines which actually hold
code. I'll send script support separately.

Committer note:

Do not use a fixed column width for the addresses, as kernel ones se
more than 10 columns, look at the last offset and get the right width.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-36-jolsa@kernel.org


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>