Fix #76770: Unix time parsed as non relative.

[sam002]

Original bug:

'U' modifier in 'datetime::createFromFormat' adds seconds to other specifiers

Examples: https://3v4l.org/ZBN3W
Patch will corrected relative seconds in time struct.
Additional:

> re2c -v
re2c 0.16

[petk]

Hello, thank you for the patch... Maybe worth noting that the ext/date/lib folder is actually a separate repository maintained at https://github.com/derickr/timelib and after release is done there, the folder here is updated also.

cc @derickr

[sam002]

@petk, thank you for explanatins.
I maked PR: derickr/timelib#47
But, what about tests?

[php-pulls]

Comment on behalf of petk at php.net:

Labelling

[krakjoe]

@sam002 the only thing that needs to be in this pr is the test, we don't accept timelib changes in this repo.

[sam002]

@krakjoe Sorry for delay. Cleared changes in ext libs.

[krakjoe]

@derickr can you take a look at this one please ?

[sam002]

@derickr @krakjoe Up. PR was merged in timelib: derickr/timelib@396dbfc
This PR ready for merge.
Build for updated (merged with current master) branch is success completed: https://travis-ci.org/github/sam002/php-src/builds/742194429

[sam002]

@petk FYI see prev.

[cmb69]

Thank you!