the bug has been introduced in r2894

instead, do chdir inside Makefile

options as --with-zlib=../zlib-1.2.3.  It seems there is no common way
to learn the current directory in Win32 make's: although nmake has MAKEDIR
variable, nevertheless Borland make's MAKEDIR is the directory where make
is installed, and OpenWatcom wmake has no MAKEDIR at all.

    *) Feature: the "server_names" directive supports the ".domain.tld"
       names.

    *) Feature: the "server_names" directive uses the hash for the
       "*.domain.tld" names and more effective hash for usual names.

    *) Change: the "server_names_hash_max_size" and
       "server_names_hash_bucket_size" directives.

    *) Change: the "server_names_hash" and "server_names_hash_threshold"
       directives were canceled.

    *) Feature: the "valid_referers" directive uses the hash site names.

    *) Change: now the "valid_referers" directive checks the site names
       only without the URI part.

    *) Bugfix: some ".domain.tld" names incorrectly processed by the
       ngx_http_map_module.

    *) Bugfix: segmentation fault was occurred if configuration file did
       not exist; the bug had appeared in 0.3.12.

    *) Bugfix: on 64-bit platforms segmentation fault may occurred on
       start; the bug had appeared in 0.3.16.

    *) Change: the invalid client header lines are now ignored and logged
       at the info level.

    *) Change: the server name is also logged in error log.

    *) Feature: the ngx_http_auth_basic_module module and the auth_basic
       and auth_basic_user_file directives.

    *) Bugfix: the ngx_http_stub_status_module showed incorrect statistics
       if "rtsig" method was used or if several worker process ran on SMP.

    *) Bugfix: nginx could not be built by the icc compiler on Linux or if
       the zlib-1.2.x library was building from sources.

    *) Bugfix: nginx could not be built on NetBSD 2.0.