[libgda/LIBGDA_5.2] Fix location of libgda-5.0.vapi for Vala extensions build

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit 732d9df2d4d4a1d13a5db28dbe30581164655246
Author: Daniel Espinosa <esodan gmail com>
Date:   Mon Oct 1 17:36:29 2018 -0500

    Fix location of libgda-5.0.vapi for Vala extensions build

 libgda/data/Makefile.am | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/libgda/data/Makefile.am b/libgda/data/Makefile.am
index 67c9476d4..3e95dc357 100644
--- a/libgda/data/Makefile.am
+++ b/libgda/data/Makefile.am
@@ -18,8 +18,8 @@ AM_CFLAGS =\
 lib_LTLIBRARIES = libgdadata-5.0.la
 
 VALAFLAGS = \
-    --vapidir=$(top_srcdir)/libgda \
-    --vapidir=$(VAPIDIR) \
+    --vapidir=$(top_builddir)/libgda \
+    --vapidir=$(datadir)/vala/vapi \
     --includedir=$(top_srcdir)/libgda \
     --pkg libxml-2.0 \
     --pkg gee-0.8 \