[pango] build: Install pango-ot headers

[Emmanuele Bassi <ebassi src gnome org>]

commit b50f0ef8bb1d8a9ad816b6dcc72b4d8962160bf0
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Sat Aug 3 12:07:51 2019 +0100

    build: Install pango-ot headers
    
    The refactoring of commit 1bdadfe1aae158fb406e10f81f3ae0533dea1602
    missed out an installed header.

 pango/meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/pango/meson.build b/pango/meson.build
index 1665a82f..3e3a3eeb 100644
--- a/pango/meson.build
+++ b/pango/meson.build
@@ -209,7 +209,7 @@ if build_pangoft2
     pangoft2_sources += pangoft2_res
   endif
 
-  install_headers(pangoft2_headers + pangofc_headers, subdir: pango_api_path)
+  install_headers(pangoft2_headers + pangofc_headers + pangoot_headers, subdir: pango_api_path)
 
   libpangoft2 = library(
     'pangoft2-@0@'.format(pango_api_version),