config-parser: export functions to open a config file

The in-tree clients can access the functions via libshared, but they are
currently not available for external clients, such as custom shell helper
applications similar to weston-desktop-shell or
weston-ivi-shell-user-interface.
The functions to read the content of the config are already exported.

Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>

shared/config-parser.c

@@ -326,6 +326,7 @@ weston_config_section_get_bool(struct weston_config_section *section,
 	return 0;
 }
 
+WL_EXPORT
 const char *
 weston_config_get_name_from_env(void)
 {
@@ -387,6 +388,7 @@ section_add_entry(struct weston_config_section *section,
 	return entry;
 }
 
+WL_EXPORT
 struct weston_config *
 weston_config_parse(const char *name)
 {