[ostree] build: Link ostree with libarchive

[Colin Walters <walters src gnome org>]

commit 6821ca1029c36440a74c17c14c29ea57f2dcfa17
Author: Joaquim Rocha <me joaquimrocha com>
Date:   Mon Feb 22 15:02:47 2016 +0100

    build: Link ostree with libarchive
    
    libarchive (when available) is being used in ot-builtin-export.c so it
    is necessary to link ostree with it.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=762457

 Makefile-ostree.am |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/Makefile-ostree.am b/Makefile-ostree.am
index ab4485c..ff7e372 100644
--- a/Makefile-ostree.am
+++ b/Makefile-ostree.am
@@ -108,3 +108,8 @@ ostree_SOURCES += \
 ostree_CFLAGS += $(OT_INTERNAL_SOUP_CFLAGS)
 ostree_LDADD += $(OT_INTERNAL_SOUP_LIBS)
 endif
+
+if USE_LIBARCHIVE
+ostree_CFLAGS += $(OT_DEP_LIBARCHIVE_CFLAGS)
+ostree_LDADD += $(OT_DEP_LIBARCHIVE_LIBS)
+endif