!3 update to 3.6.4 to fix use of uninitionalize problem

From: @jackie_wu123
Reviewed-by: @small_leek
Signed-off-by: @small_leek

libsass.spec

@@ -1,6 +1,6 @@
 Name:           libsass
-Version:        3.5.4
-Release:        4
+Version:        3.6.4
+Release:        1
 Summary:        A Sass CSS precompiler which is ported for C/C++
 
 License:        MIT
@@ -52,6 +52,9 @@ autoreconf --force --install
 %{_libdir}/pkgconfig/*.pc
 
 %changelog
+* Mon Dec 7 2020 wutao <wutao61@huawei.com> - 3.6.4-1
+- update to 3.6.4 to fix use of unintialized problem
+
 * Tue Dec 31 2019 lihao <lihao129@huawei.com> - 3.5.4-4
 - Package Init