configure: Set the target flags from the --host option even if cross-compiling is not detected.

configure.ac

diff --git a/configure.ac b/configure.ac
index 34650c8..57ec39d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -169,9 +169,9 @@
      AC_MSG_ERROR([could not find Wine tools in $with_wine_tools.])
    fi])
 AC_SUBST(TOOLSDIR,$wine_cv_toolsdir)
-if test "$cross_compiling" = "yes"
+if test -n "$host_alias"
 then
-    AC_SUBST(TARGETFLAGS,"-b $host_alias")
+    AC_SUBST(TARGETFLAGS,"-b $host_alias $TARGETFLAGS")
 fi
 
 dnl Check for flex