[gnome-db] compile mdb provider from git under windows

[Andrea Zagli <azagli libero it>]

i had to apply this tiny patch attached

diff --git a/providers/mdb/Makefile.am b/providers/mdb/Makefile.am
index fd997cc..bd5b083 100644
--- a/providers/mdb/Makefile.am
+++ b/providers/mdb/Makefile.am
@@ -4,7 +4,7 @@ provider_LTLIBRARIES = libgda-mdb.la
 if PLATFORM_WIN32
 SUBDIRS = libmdb-src
 extra_mdb_cflags = -I$(srcdir)/libmdb-src/include
-extra_mdb_ldflags = libmdb-src/libmdb.la
+extra_mdb_ldflags = -liconv libmdb-src/libmdb.la
 else
 extra_mdb_cflags = $(MDB_CFLAGS)
 extra_mdb_ldflags = $(MDB_LIBS)