Appears twice in compiler command line.

relates #8990

ci_branch=pr19022

Nightly build.

[ 18%] Building CXX object modules/core/CMakeFiles/opencv_core.dir/src/system.cpp.o
cd /build/3_4-lin64/build/modules/core && /usr/bin/ccache /usr/bin/c++ -DCVAPI_EXPORTS -DOPENCV_ALLOCATOR_STATS_COUNTER_TYPE=int -DOPENCV_WITH_ITT=1 -D_USE_MATH_DEFINES -D__OPENCV_BUILD=1 -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/build/3_4-lin64/build/3rdparty/ippicv/ippicv_lnx/icv/include -I/build/3_4-lin64/build/3rdparty/ippicv/ippicv_lnx/iw/include -isystem /build/3_4-lin64/build -isystem /usr/include/gdal -isystem /usr/include/eigen3 -I/build/3_4-lin64/opencv/modules/core/include -I/build/3_4-lin64/build/modules/core -I/build/3_4-lin64/opencv/3rdparty/include/opencl/1.2 -I/build/3_4-lin64/opencv/3rdparty/ittnotify/include -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Winit-self -Wno-delete-non-virtual-dtor -Wno-comment -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -fvisibility-inlines-hidden -O3 -DNDEBUG -DNDEBUG -fPIC -o CMakeFiles/opencv_core.dir/src/system.cpp.o -c /build/3_4-lin64/opencv/modules/core/src/system.cpp