[strace/strace] Feature request: Display the full syscall line on resuming (#152)

[Igor Zhbanov]

Currently when tracing multiple processes you could see something like:
```
[pid  1905] select(0, NULL, NULL, NULL, {0, 198904} <unfinished ...>
[pid 23966] ftruncate(28, 25165824)     = 0
[pid 32266] epoll_wait(20,  <unfinished ...>
[pid  1905] <... select resumed> )      = 0 (Timeout)
```
So on resuming you often need to scroll back to understand of what syscall was continued. especially when you see that resumed syscall failed with some error. So may be there could be an option, so the output could be something like this:
```
[pid  1905] select(0, NULL, NULL, NULL, {0, 198904} <unfinished ...>
[pid 23966] ftruncate(28, 25165824)     = 0
[pid 32266] epoll_wait(20,  <unfinished ...>
[pid  1905] <resumed> select(0, NULL, NULL, NULL, {0, 198904})      = 0 (Timeout)
```
It would make reading the logs easier.

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