Fix double header inclusion for bug with recent autoconf/automake

RP 4/2/10

Index: pango-1.22.2/pango/Makefile.am
===================================================================
--- pango-1.22.2.orig/pango/Makefile.am	2010-02-04 12:05:30.000000000 +0000
+++ pango-1.22.2/pango/Makefile.am	2010-02-04 12:07:21.000000000 +0000
@@ -233,7 +233,7 @@
 # ------------------- libpangoxft -------------------
 
 if HAVE_XFT
-pangoinclude_HEADERS += pangoxft.h pangoxft-render.h pango-ot.h
+pangoinclude_HEADERS += pangoxft.h pangoxft-render.h
 lib_LTLIBRARIES += libpangoxft-1.0.la
 endif