Fix ancient compiler warnings and typos in !HAVE_SYMLINK code

This has never been correct since this code was introduced.

src/bin/initdb/initdb.c

@@ -3206,7 +3206,7 @@ create_xlog_or_symlink(void)
 			exit_nicely();
 		}
 #else
-		fprintf(stderr, _("%s: symlinks are not supported on this platform"));
+		fprintf(stderr, _("%s: symlinks are not supported on this platform\n"), progname);
 		exit_nicely();
 #endif
 	}

src/bin/pg_basebackup/pg_basebackup.c

@@ -2280,7 +2280,7 @@ main(int argc, char **argv)
 			exit(1);
 		}
 #else
-		fprintf(stderr, _("%s: symlinks are not supported on this platform\n"));
+		fprintf(stderr, _("%s: symlinks are not supported on this platform\n"), progname);
 		exit(1);
 #endif
 		free(linkloc);