packaging: build csdiff-static on RHEL-8 and newer

[kdudka]

Related: csutils/csmock#216

[kdudka]

The epel-8-x86_64 build fails with:

[100%] Linking CXX executable csgrep-static
cd /builddir/build/BUILD/csdiff-3.5.5.20251110.164303.gb5cd773.pr_235/x86_64-redhat-linux-gnu/src && /usr/bin/cmake -E cmake_link_script CMakeFiles/csgrep-static.dir/link.txt --verbose=1
/usr/bin/c++ -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -Wall -Wextra -pedantic -Wl,-z,relro  -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -static "CMakeFiles/csgrep-static.dir/csgrep.cc.o" -o csgrep-static  lib/libcs.a /usr/lib64/libboost_filesystem.a /usr/lib64/libboost_program_options.a /usr/lib64/libboost_regex.a 
lib/libcs.a(parser-gcc.cc.o):/usr/include/boost1.78/boost/filesystem/path.hpp:810: undefined reference to `boost::filesystem::path::filename_v3() const'
lib/libcs.a(parser-gcc.cc.o):/usr/include/boost1.78/boost/filesystem/path.hpp:810: undefined reference to `boost::filesystem::path::filename_v3() const'
lib/libcs.a(parser-gcc.cc.o):/usr/include/boost1.78/boost/filesystem/path.hpp:782: undefined reference to `boost::filesystem::path::compare_v3(boost::filesystem::path const&) const'
lib/libcs.a(parser-json-sarif.cc.o):/usr/include/boost1.78/boost/filesystem/path.hpp:840: undefined reference to `boost::filesystem::path::lexically_normal_v3() const'
collect2: error: ld returned 1 exit status
gmake[2]: *** [src/CMakeFiles/csgrep-static.dir/build.make:104: src/csgrep-static] Error 1
gmake[2]: Leaving directory '/builddir/build/BUILD/csdiff-3.5.5.20251110.164303.gb5cd773.pr_235/x86_64-redhat-linux-gnu'
gmake[1]: Leaving directory '/builddir/build/BUILD/csdiff-3.5.5.20251110.164303.gb5cd773.pr_235/x86_64-redhat-linux-gnu'
gmake[1]: *** [CMakeFiles/Makefile2:476: src/CMakeFiles/csgrep-static.dir/all] Error 2
gmake: *** [Makefile:149: all] Error 2