[libchamplain] Build fixes for builddir != srcdir

[Emmanuele Bassi <ebassi src gnome org>]

commit 713f73b933730d64d6e037c548cb9fbbe210d039
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Fri Jan 15 14:26:28 2016 +0000

    Build fixes for builddir != srcdir
    
    Generated files go in builddir, which evaluates to '.', not in srcdir.
    
    Without this change, libchamplain fails to build in Continuous with the
    following error:
    
    make[3]: *** No rule to make target '../../champlain/champlain-enum-types.h', needed by 
'Champlain-0.12.gir'.  Stop.

 champlain/Makefile.am |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/champlain/Makefile.am b/champlain/Makefile.am
index f9c2dc4..1411f6a 100644
--- a/champlain/Makefile.am
+++ b/champlain/Makefile.am
@@ -110,7 +110,7 @@ include $(top_srcdir)/build/Makefile.am.marshal
 # glib-mkenums rules
 glib_enum_h = champlain-enum-types.h
 glib_enum_c = champlain-enum-types.c
-glib_enum_headers = $(filter-out $(srcdir)/champlain-version.h,$(libchamplain_headers_public))
+glib_enum_headers = $(filter-out champlain-version.h,$(libchamplain_headers_public))
 include $(top_srcdir)/build/Makefile.am.enums
 
 libchamplain_headers_built =   \
@@ -165,7 +165,7 @@ INTROSPECTION_SCANNER_ARGS = --warn-all
 INTROSPECTION_COMPILER_ARGS =
 introspection_sources = \
        $(filter-out $(srcdir)/champlain-version.h,$(libchamplain_headers_public))      \
-       $(srcdir)/champlain-enum-types.h                                                \
+       champlain-enum-types.h                                          \
        $(libchamplain_sources)
 if ENABLE_MEMPHIS
 memphis_gir_include = Memphis-0.2