* boehm-gc/include/gc.h: (GC_CreateThread) This function is
        now exposed on all Win32 platforms.
        * boehm-gc/win32_threads.c: (GC_CreateThread) This now
        compiles on Win32; it invokes CreateThread() if GC is built
        as a DLL; otherwise it registers the thread.
        * boehm-gc/misc.c (GC_init): Initialize GC_allocate_ml in case
        libgcjgc was not built as a DLL.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@49563 138bc75d-0d04-0410-961f-82ee72b054a4