[pango] Fix building with libthai

[Khaled Hosny <khaledh src gnome org>]

commit 0ec2a4821a37b31e01a0e70fae0fe99035cc2385
Author: Khaled Hosny <khaledhosny eglug org>
Date:   Sun Apr 5 23:43:49 2015 +0200

    Fix building with libthai
    
    Regression from 137832fa931e875b900dedd1c8909b46d1f7e8ad.

 pango/Makefile.am |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/pango/Makefile.am b/pango/Makefile.am
index b2469ad..38e92a0 100644
--- a/pango/Makefile.am
+++ b/pango/Makefile.am
@@ -27,6 +27,7 @@ INCLUDES =                                            \
        $(CAIRO_CFLAGS)                                 \
        $(HARFBUZZ_CFLAGS)                              \
        $(FREETYPE_CFLAGS)                              \
+       $(LIBTHAI_CFLAGS)                                       \
        $(X_CFLAGS)
 
 BUILT_SOURCES = pango-enum-types.h pango-enum-types.c pango-features.h
@@ -46,6 +47,7 @@ INTROSPECTION_GIRS += Pango-1.0.gir
 libpango_1_0_la_LDFLAGS = $(LIBRARY_LIBTOOL_OPTIONS)
 libpango_1_0_la_LIBADD =               \
        $(GLIB_LIBS)                    \
+       $(LIBTHAI_LIBS)                 \
        $(libm)
 
 libpango_1_0_la_LIBADD += mini-fribidi/libmini-fribidi.la