[atkmm] atk/atkmm.pc.in: Add atkmmconfig.h's install directory

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 1155efe1403ce673db1f6ddb6a81bdd4c8f001b7
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Mon Apr 13 12:46:33 2020 +0200

    atk/atkmm.pc.in: Add atkmmconfig.h's install directory
    
    Add -I${libdir}/@ATKMM_MODULE_NAME@/include to the C flags, so other modules
    can include header files that include atkmmconfig.h.

 atk/atkmm.pc.in | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/atk/atkmm.pc.in b/atk/atkmm.pc.in
index 2d8474c..eeb2dea 100644
--- a/atk/atkmm.pc.in
+++ b/atk/atkmm.pc.in
@@ -18,4 +18,4 @@ Version: @PACKAGE_VERSION@
 URL: http://www.gtkmm.org/
 Requires: @ATKMM_MODULES@
 Libs: -L${libdir} -latkmm-@ATKMM_API_VERSION@
-Cflags: -I${includedir}/@ATKMM_MODULE_NAME@
+Cflags: -I${includedir}/@ATKMM_MODULE_NAME@ -I${libdir}/@ATKMM_MODULE_NAME@/include