[NetworkManager-fortisslvpn] build: make sure appdata is around

[Lubomir Rintel <lkundrak src gnome org>]

commit d386fe1f6196e09a39ea886d5e3288b0b083e56f
Author: Lubomir Rintel <lkundrak v3 sk>
Date:   Tue Apr 2 08:22:27 2019 +0200

    build: make sure appdata is around
    
    Fixes subdir build from git checkout.

 Makefile.am | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/Makefile.am b/Makefile.am
index d03e23a..b65fba9 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -316,6 +316,7 @@ endif
 appdata_in_files = appdata/network-manager-fortisslvpn.metainfo.xml.in
 
 appdata/network-manager-fortisslvpn.metainfo.xml: appdata/network-manager-fortisslvpn.metainfo.xml.in
+       @$(MKDIR_P) appdata/
        $(AM_V_GEN)$(MSGFMT) --xml --template $< -d $(top_srcdir)/po -o $@
 
 nm-fortisslvpn-service.name: $(srcdir)/nm-fortisslvpn-service.name.in