[glib/clang-cl-improvements] glib-sections.txt: Add g_macro__has_extension in private section

[Chun-wei Fan <fanchunwei src gnome org>]

commit 35154a3519b8626b52ffb2db80902b50f44732ba
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Wed Mar 31 10:50:27 2021 +0800

    glib-sections.txt: Add g_macro__has_extension in private section
    
    This should satisfy the documentation build check.

 docs/reference/glib/glib-sections.txt | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/docs/reference/glib/glib-sections.txt b/docs/reference/glib/glib-sections.txt
index b03c693d4..db0e554e7 100644
--- a/docs/reference/glib/glib-sections.txt
+++ b/docs/reference/glib/glib-sections.txt
@@ -753,6 +753,7 @@ glib_typeof_2_68
 g_macro__has_attribute
 g_macro__has_builtin
 g_macro__has_feature
+g_macro__has_extension
 </SECTION>
 
 <SECTION>