* glib.def: Added new functions.

* gutils.c:
(g_getenv): Better implementation on Win32. No loop necessary.
(g_get_any_init): Use P_tmpdir if defined as tmp directory. Don't
set home dir always to NULL on Win32.  Don't use tmp directory as
last resort home directory, but return NULL if no home
directory is known (application must check).

* makefile.msc: Better touch command, just COPYing a single file
sets the timestamp from that file, which isn't what touching should
do.