libsparse: rename symbols that conflict with libext4_utils

Until ext4_utils switches to using libsparse, libext4_utils defines some
of the same symbols as libsparse.  Fastboot links statically against
both of them, and there is no easy way to make the symbols hidden, so
just rename them in libsparse.

Change-Id: Idc2cfe20efe3c3a7fb8233f453a89bbbeb0dcc8b
diff --git a/libsparse/sparse.c b/libsparse/sparse.c
index f04f687..189b4c0 100644
--- a/libsparse/sparse.c
+++ b/libsparse/sparse.c
@@ -156,14 +156,14 @@
 	struct output_file *out;
 
 	chunks = sparse_count_chunks(s);
-	out = open_output_fd(fd, s->block_size, s->len, gz, sparse, chunks, crc);
+	out = output_file_open_fd(fd, s->block_size, s->len, gz, sparse, chunks, crc);
 
 	if (!out)
 		return -ENOMEM;
 
 	ret = write_all_blocks(s, out);
 
-	close_output_file(out);
+	output_file_close(out);
 
 	return ret;
 }
@@ -176,7 +176,7 @@
 	struct output_file *out;
 
 	chunks = sparse_count_chunks(s);
-	out = open_output_callback(write, priv, s->block_size, s->len, false,
+	out = output_file_open_callback(write, priv, s->block_size, s->len, false,
 			sparse, chunks, crc);
 
 	if (!out)
@@ -184,7 +184,7 @@
 
 	ret = write_all_blocks(s, out);
 
-	close_output_file(out);
+	output_file_close(out);
 
 	return ret;
 }
@@ -203,7 +203,7 @@
 	int64_t count = 0;
 	struct output_file *out;
 
-	out = open_output_callback(out_counter_write, &count,
+	out = output_file_open_callback(out_counter_write, &count,
 			s->block_size, s->len, false, sparse, chunks, crc);
 	if (!out) {
 		return -1;
@@ -211,7 +211,7 @@
 
 	ret = write_all_blocks(s, out);
 
-	close_output_file(out);
+	output_file_close(out);
 
 	if (ret < 0) {
 		return -1;
@@ -239,7 +239,7 @@
 	len -= overhead;
 
 	start = backed_block_iter_new(from->backed_block_list);
-	out_counter = open_output_callback(out_counter_write, &count,
+	out_counter = output_file_open_callback(out_counter_write, &count,
 			to->block_size, to->len, false, true, 0, false);
 	if (!out_counter) {
 		return NULL;
@@ -269,7 +269,7 @@
 	backed_block_list_move(from->backed_block_list,
 		to->backed_block_list, start, last_bb);
 
-	close_output_file(out_counter);
+	output_file_close(out_counter);
 
 	return bb;
 }