libgltf: try again with this configure patch

Touch only the configure but not the configure.ac

Change-Id: Iee93036f2378f29530ffae9be8b4324e8425d2ec

external/libgltf/patches/libgltf_configure.patch

@@ -59,44 +59,3 @@ diff -ur libgltf.org/configure libgltf/configure
  ac_ext=cpp
  ac_cpp='$CXXCPP $CPPFLAGS'
  ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
-diff -ur libgltf.org/configure.ac libgltf/configure.ac
---- libgltf.org/configure.ac	2014-06-25 18:41:32.470228670 +0200
-+++ libgltf/configure.ac	2014-06-25 18:41:41.186228300 +0200
-@@ -36,16 +36,22 @@
- # =========
- # Find boost
- # =========
--AC_CHECK_HEADER(boost/property_tree/json_parser.hpp, [BOOST_CFLAGS=],
-+save_CPPFLAGS=$CPPFLAGS
-+CPPFLAGS="$CPPFLAGS $BOOST_CFLAGS"
-+AC_CHECK_HEADER(boost/property_tree/json_parser.hpp, [],
-  [AC_MSG_ERROR(boost/property_tree/json_parser.hpp not found. install boost)], [])
-+CPPFLAGS=$save_CPPFLAGS
- AC_SUBST([BOOST_CFLAGS])
- 
- # =========
- # Find glew
- # =========
- PKG_CHECK_MODULES(GLEW, [glew >= 1.9.0], [] [
-- AC_CHECK_HEADER(GL/glew.h, [GLEW_CFLAGS=],
-+ save_CPPFLAGS=$CPPFLAGS
-+ CPPFLAGS="$CPPFLAGS $GLEW_CFLAGS"
-+ AC_CHECK_HEADER(GL/glew.h, [],
-  [AC_MSG_ERROR(GL/glew.h not found. install glew)], [])
-+ CPPFLAGS=$save_CPPFLAGS
- ])
- AC_SUBST([GLEW_CFLAGS])
- AC_SUBST([GLEW_LIBS])
-@@ -54,8 +60,11 @@
- # Find glm
- # =========
- AC_LANG_PUSH([C++])
--AC_CHECK_HEADER([glm/glm.hpp], [GLM_CFLAGS=],
-+save_CPPFLAGS=$CPPFLAGS
-+CPPFLAGS="$CPPFLAGS $GLM_CFLAGS"
-+AC_CHECK_HEADER([glm/glm.hpp], [],
-  [AC_MSG_ERROR([glm/glm.hpp not found. install glm])], [])
-+CPPFLAGS=$save_CPPFLAGS
- AC_LANG_POP([C++])
- AC_SUBST([GLM_CFLAGS])
-