WIP codecov integration changes

[marcinslusarz]

This change is 

[codecov-io]

Codecov Report

Merging #330 into master will decrease coverage by 5.47%. The diff coverage is n/a.

@@            Coverage Diff            @@
##           master    #330      +/-   ##
=========================================
- Coverage   78.18%   72.7%   -5.48%     
=========================================
  Files          90      64      -26     
  Lines       13827    7845    -5982     
  Branches     1996    1604     -392     
=========================================
- Hits        10811    5704    -5107     
+ Misses       2294    1643     -651     
+ Partials      722     498     -224

Flag	Coverage Δ
#sqlite_tests	45.93% <ø> (?)
#tests_antool	12.38% <ø> (?)
#tests_posix_multi_threaded	58.74% <ø> (?)
#tests_posix_single_threaded	57.99% <ø> (?)
#tests_preload	70.96% <ø> (?)

Impacted Files	Coverage Δ
src/libpmemfile-posix/dir.c	83.04% <0%> (-0.74%)	:arrow_down:
tests/posix/pmemfile_test.hpp
tests/posix/mt/mt.cpp
tests/test_backtrace.c
tests/posix/pointer_caching/pointer_caching.cpp
tests/posix/rw/rw.cpp
tests/preload/setumask.c
...tils/transform/transform_pmemfile_posix_fd_first.c
tests/posix/symlinks/symlinks.cpp
tests/posix/getdents/getdents.cpp
... and 21 more

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[GBuella]

Z3!

[krzycz]

R2D2 & 3CPO ;-)

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Reviewed 1 of 3 files at r1, 2 of 2 files at r2. Review status: all files reviewed at latest revision, all discussions resolved.

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Comments from Reviewable

[marcinslusarz]

Guys, this is WIP PR. I'm using it for testing CodeCov integration changes.