[libgdata] build: Update ACLOCAL_AMFLAGS to install third-party macros

[Philip Withnall <pwithnall src gnome org>]

commit dac4f090da5f57dbd4de316e75fb2dbf5408102e
Author: Philip Withnall <philip withnall collabora co uk>
Date:   Tue May 26 18:42:55 2015 +0100

    build: Update ACLOCAL_AMFLAGS to install third-party macros
    
    So that they are carried around in the distributed tarball, and there
    are no dependencies on things like autoconf-archive.
    
    https://wiki.gnome.org/Projects/GnomeCommon/Migration

 Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index de9a099..b64d573 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,6 +1,6 @@
 SUBDIRS = . po docs gdata/tests
 
-ACLOCAL_AMFLAGS = -I m4 ${ACLOCAL_FLAGS}
+ACLOCAL_AMFLAGS = --install -I m4 ${ACLOCAL_FLAGS}
 
 DISTCHECK_CONFIGURE_FLAGS =
 MAINTAINERCLEANFILES =