[nginx] Configure: fixed build with --with-stream.

[Ruslan Ermilov]

details:   http://hg.nginx.org/nginx/rev/29e452c56125
branches:  
changeset: 6933:29e452c56125
user:      Ruslan Ermilov <ru at nginx.com>
date:      Thu Mar 16 20:38:26 2017 +0300
description:
Configure: fixed build with --with-stream.

Some combinations of options might cause the builds with the
--with-stream option to break due to invalid value of the
STREAM_INCS make variable, e.g.

auto/configure \
    --with-stream \
    --with-http_perl_module=dynamic \
    --without-http_memcached_module \
    --without-http_empty_gif_module \
    --without-http_browser_module \
    --without-http_upstream_hash_module \
    --without-http_upstream_ip_hash_module \
    --without-http_upstream_least_conn_module \
    --without-http_upstream_keepalive_module \
    --without-http_upstream_zone_module \

Explicit initialization of ngx_module_libs and ngx_module_link
matches what we already do when processing mail modules, and
is also required after the next change.

diffstat:

 auto/modules |  2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diffs (12 lines):

diff -r e54c336d95aa -r 29e452c56125 auto/modules
--- a/auto/modules	Thu Mar 16 19:01:05 2017 +0300
+++ b/auto/modules	Thu Mar 16 20:38:26 2017 +0300
@@ -966,6 +966,8 @@ if [ $STREAM != NO ]; then
     STREAM_INCS=
 
     ngx_module_type=STREAM
+    ngx_module_libs=
+    ngx_module_link=YES
 
     ngx_module_order=