[empathy] Display GOA_PKG_ERRORS if deps are missing

[Guillaume Desmottes <gdesmott src gnome org>]

commit 15e2a556e3e5c9efadc3153223d17d4cab8597e1
Author: Guillaume Desmottes <guillaume desmottes collabora co uk>
Date:   Mon Jul 16 15:28:40 2012 +0200

    Display GOA_PKG_ERRORS if deps are missing

 configure.ac |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index be251f5..88c472c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -461,7 +461,9 @@ else
 fi
 
 if test "x$enable_goa" = "xyes" -a "x$have_goa" != "xyes"; then
-   AC_MSG_ERROR([Could not find GOA dependencies.])
+   AC_MSG_ERROR([Could not find GOA dependencies:
+
+$GOA_PKG_ERRORS])
 fi
 
 if test "x$have_goa" = "xyes"; then