libyang CHANGE rename ambiguous lyp_ prefixed functions and structures

The 'p' in the lyp_ prefix is not unique since it may refer to printer
as well as parser. Some of the objects are connected with libyang output
object, so they are now prefixed by 'ly_out_' prefix. The rest
(lyp_print() or lyp_write()) is so generic that only the `ly_` prefix
can be used for them.
diff --git a/tools/lint/commands.c b/tools/lint/commands.c
index d82e6e9..524eabb 100644
--- a/tools/lint/commands.c
+++ b/tools/lint/commands.c
@@ -346,7 +346,7 @@
     const char *out_path = NULL, *target_path = NULL;
     const struct lys_module *module;
     LYS_OUTFORMAT format = LYS_OUT_TREE;
-    struct lyp_out *out = NULL;
+    struct ly_out *out = NULL;
     static struct option long_options[] = {
         {"help", no_argument, 0, 'h'},
         {"format", required_argument, 0, 'f'},
@@ -494,9 +494,9 @@
     }
 
     if (out_path) {
-        out = lyp_new_filepath(out_path);
+        out = ly_out_new_filepath(out_path);
     } else {
-        out = lyp_new_file(stdout);
+        out = ly_out_new_file(stdout);
     }
     if (!out) {
         fprintf(stderr, "Could not open the output file (%s).\n", strerror(errno));
@@ -518,7 +518,7 @@
     free(*argv);
     free(argv);
 
-    lyp_free(out, NULL, out_path ? 1 : 0);
+    ly_out_free(out, NULL, out_path ? 1 : 0);
 
     return ret;
 }
@@ -700,7 +700,7 @@
     struct lyd_node *tree = NULL;
     const struct lyd_node **trees = NULL;
     LYD_FORMAT outformat = 0;
-    struct lyp_out *out = NULL;
+    struct ly_out *out = NULL;
     static struct option long_options[] = {
         {"defaults", required_argument, 0, 'd'},
         {"help", no_argument, 0, 'h'},
@@ -835,9 +835,9 @@
     }
 
     if (out_path) {
-        out = lyp_new_filepath(out_path);
+        out = ly_out_new_filepath(out_path);
     } else {
-        out = lyp_new_file(stdout);
+        out = ly_out_new_file(stdout);
     }
     if (!out) {
         fprintf(stderr, "Could not open the output file (%s).\n", strerror(errno));
@@ -854,7 +854,7 @@
     free(*argv);
     free(argv);
 
-    lyp_free(out, NULL, out_path ? 1 : 0);
+    ly_out_free(out, NULL, out_path ? 1 : 0);
 
     lyd_free_all(data);