* fix .ncc_style target names
it was breaking configure on system with libclang-12-dev, clang-12,
ninja and cmake 3.17+(ninja complains about duplicate
target). with lower cmake version configure succeeds, but build exits
immediately with error. by replacing ninja with make error becomes
warning(it's still significant, make just skips duplicate rules, i.e.
doesn't check style of some source files, rule duplication is genuine
bug). without libclang-12-dev and clang-12 ENABLE_NCC_STYLE is OFF and
bug is not triggered
* silence uninitialized warning in core_integration
probably it was always initialized before use, but compiler wasn't made
aware of it
* fix function spelling to unbreak code style checks in benchmark_app
* include <thread> for std::this_thread
existing code was relying on namespace pollution by old libstdc++
* replace is_pod with is_standard_layout && is_trivial
is_pod is deprecated, it breaks build on current gcc
Co-authored-by: Serhii Pavlovskyi <spavlovskyi@lohika.com>
Co-authored-by: Ilya Churaev <ilya.churaev@intel.com>
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