Option --preserve-build-id for Gnu ELF; contributed by Nicholas Twerdochlib

(SourceForge [ upx-Patches-3413335 ])

src/options.h

@@ -146,6 +146,7 @@ struct options_t {
         unsigned char osabi0;       // replacement if 0==.e_ident[EI_OSABI]
         enum { SCRIPT_MAX = 32 };
         const char *script_name;
+        bool preserve_build_id;		// copy the build-id to the compressed binary
     } o_unix;
     struct {
         bool le;