Build-id generation not subjected to %exclude

[dmnks]

This appears to be a bug in that we let rpmbuild generate .build-id symlinks even for files that are %excluded from the given subpackage.

The original report: https://bugzilla.redhat.com/show_bug.cgi?id=2142890

Mark Wielaard proposed a patch in the above BZ which looks like this (untested):

diff --git a/build/files.c b/build/files.c
index aab128aaa..803a97248 100644
--- a/build/files.c
+++ b/build/files.c
@@ -1896,7 +1896,8 @@ static int generateBuildIDs(FileList fl, ARGV_t *files)
     int needDbg = 0;
     for (i = 0, flp = fl->files.recs; i < fl->files.used; i++, flp++) {
        struct stat sbuf;
-       if (lstat(flp->diskPath, &sbuf) == 0 && S_ISREG (sbuf.st_mode)) {
+       if (lstat(flp->diskPath, &sbuf) == 0 && S_ISREG (sbuf.st_mode)
+           && (flp->flags & RPMFILE_EXCLUDE) == 0) {
            /* We determine whether this is a main or
               debug ELF based on path.  */
            int isDbg = strncmp (flp->cpioPath,