[gnome-builder] build: fix GI_TYPELIB_PATH

[Christian Hergert <chergert src gnome org>]

commit 3d1a8dfb00ea1794f66c9c220915a071d2a66f69
Author: Christian Hergert <christian hergert me>
Date:   Sun Sep 6 15:44:20 2015 -0700

    build: fix GI_TYPELIB_PATH

 Makefile.am |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 58df2cf..debd4c4 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -84,14 +84,14 @@ strace:
 
 debug:
        GB_IN_TREE_PLUGINS=1 \
-       GI_TYPELIB_PATH="libide:src" \
+       GI_TYPELIB_PATH="libide:src:$(GI_TYPELIB_PATH)" \
        G_DEBUG=fatal-criticals \
        GOBJECT_DEBUG=instance-count \
        $(LIBTOOL) --mode=execute gdb -ex run --args src/gnome-builder -vvvv -s
 
 valgrind:
        GB_IN_TREE_PLUGINS=1 \
-       GI_TYPELIB_PATH="libide:src" \
+       GI_TYPELIB_PATH="libide:src:$(GI_TYPELIB_PATH)" \
        G_DEBUG=fatal-criticals \
        G_SLICE=always-malloc \
        $(LIBTOOL) --mode=execute valgrind src/gnome-builder -vvvv -s