clone/sha1_file: read info/alternates with strbuf_getline()

$GIT_OBJECT_DIRECTORY/info/alternates is a text file that can be
edited with a DOS editor.  We do not want to use the real path with
CR appended at the end.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/clone.c

@@ -339,7 +339,7 @@ static void copy_alternates(struct strbuf *src, struct strbuf *dst,
 	FILE *in = fopen(src->buf, "r");
 	struct strbuf line = STRBUF_INIT;
 
-	while (strbuf_getline_lf(&line, in) != EOF) {
+	while (strbuf_getline(&line, in) != EOF) {
 		char *abs_path;
 		if (!line.len || line.buf[0] == '#')
 			continue;

sha1_file.c

@@ -396,7 +396,7 @@ void add_to_alternates_file(const char *reference)
 		struct strbuf line = STRBUF_INIT;
 		int found = 0;
 
-		while (strbuf_getline_lf(&line, in) != EOF) {
+		while (strbuf_getline(&line, in) != EOF) {
 			if (!strcmp(reference, line.buf)) {
 				found = 1;
 				break;