glib: Install missing header

https://gitlab.freedesktop.org/poppler/poppler/issues/647
diff --git a/glib/CMakeLists.txt b/glib/CMakeLists.txt
index 97317f0..beae865 100644
--- a/glib/CMakeLists.txt
+++ b/glib/CMakeLists.txt
@@ -31,6 +31,7 @@
   poppler-form-field.h
   poppler-annot.h
   poppler-layer.h
+  poppler-macros.h
   poppler-movie.h
   poppler-media.h
   poppler.h