[ObjCopy] Fix warning in conditional expression [NFC]

Without the fix gcc warned with
 ../lib/ObjCopy/ELF/ELFObjcopy.cpp: In function 'uint64_t getSectionFlagsPreserveMask(uint64_t, uint64_t, uint16_t)':
 ../lib/ObjCopy/ELF/ELFObjcopy.cpp:106:31: warning: enumeral and non-enumeral type in conditional expression [-Wextra]
   106 |       ~(EMachine == EM_X86_64 ? ELF::SHF_X86_64_LARGE : 0UL);
       |         ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~