[libmediaart] build: Add an explicit dependency on marshal files

[Emmanuele Bassi <ebassi src gnome org>]

commit 269290ef6debc3170f33250385f79f3fb27c7cbf
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Mon Jul 17 13:25:24 2017 +0100

    build: Add an explicit dependency on marshal files
    
    We need those files to be generated before the library is built, but it
    seems Automake is failing miserably in conditions of massive parallelism.

 libmediaart/Makefile.am |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/libmediaart/Makefile.am b/libmediaart/Makefile.am
index 0e55b6a..da5073a 100644
--- a/libmediaart/Makefile.am
+++ b/libmediaart/Makefile.am
@@ -29,6 +29,8 @@ libmediaartinclude_HEADERS = \
        extract.h \
        extractgeneric.h
 
+libmediaart_@LIBMEDIAART_API_VERSION@_la_DEPENDENCIES = $(libmediaart_marshal_sources)
+
 libmediaart_@LIBMEDIAART_API_VERSION@_la_SOURCES = \
        $(libmediaart_marshal_sources) \
        $(libmediaart_sources)