[LTP] Increase timeout of slow `sendfile09` and `fsync02`

[dimakuv]

Description of the changes

sendfile09 is already slow on my machine with SSD (2-5 seconds). So I can imagine how it exceeds the 30-second default timeout on our tiny NUCs with probably super-slow HDDs. Also recall that LTP tests are run in parallel in our CI, so the perf gets even worse.

I checked other sendfile* LTP tests, and they all operate on small data (up to 100 bytes). That's why they never timeout, but sendfile09 does.

UPDATE: Added fsync02 here, with timeout of 120 seconds. Looking at the sources of this test, I see this:

/* fsync() has to finish within TIME_LIMIT. */
#define TIME_LIMIT 120

How to test this PR?

Jenkins. Can try several times to make sure we solved this issue.

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This change is 

[dimakuv]

Jenkins, retest Jenkins-Debug-18.04 please (fsync02 LTP test timed out, unrelated)

[dimakuv]

Jenkins, retest this please