[libgxps] Fix capitalization Gxps_CFLAGS -> GXPS_CFLAGS

[Carlos Garcia Campos <carlosgc src gnome org>]

commit ef4da36beb8369376b3cf0d4ca9c463627ffa640
Author: Jason Crain <jason inspiresomeone us>
Date:   Mon Dec 5 11:30:14 2016 -0600

    Fix capitalization Gxps_CFLAGS -> GXPS_CFLAGS
    
    Fixes building the introspection files because the right CFLAGS were not
    being passed to g-ir-scanner.
    
    Bug #775637

 libgxps/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libgxps/Makefile.am b/libgxps/Makefile.am
index 1c63ef0..57cc9c8 100644
--- a/libgxps/Makefile.am
+++ b/libgxps/Makefile.am
@@ -59,7 +59,7 @@ introspection_sources = $(filter-out $(NOINST_H_FILES) gxps-archive.c gxps-fonts
 
 GXPS-0.1.gir: libgxps.la
 GXPS_0_1_gir_INCLUDES = GObject-2.0 Gio-2.0 cairo-1.0
-GXPS_0_1_gir_CFLAGS = $(libgxps_la_CPPFLAGS) $(Gxps_CFLAGS)
+GXPS_0_1_gir_CFLAGS = $(libgxps_la_CPPFLAGS) $(GXPS_CFLAGS)
 GXPS_0_1_gir_LIBS = libgxps.la
 GXPS_0_1_gir_FILES = $(addprefix $(srcdir)/, $(introspection_sources))