introduce bb_putchar(). saves ~1800 on uclibc (less on glibc).

archival/gzip.c

@@ -686,7 +686,7 @@ static void check_match(IPos start, IPos match, int length)
 	if (verbose > 1) {
 		bb_error_msg("\\[%d,%d]", start - match, length);
 		do {
-			putc(G1.window[start++], stderr);
+			fputc(G1.window[start++], stderr);
 		} while (--length != 0);
 	}
 }

archival/libunarchive/header_verbose_list.c

@@ -26,6 +26,5 @@ void header_verbose_list(const file_header_t *file_header)
 	if (file_header->link_target) {
 		printf(" -> %s", file_header->link_target);
 	}
-	/* putchar isnt used anywhere else i dont think */
-	puts("");
+	bb_putchar('\n');
 }