asm/ucontext.h will be used to implement a crash handler in msflinker,
which should allow for easier debugging and development of msflinker
and extension code.
thread.c/h, fixes a bug if you thread_create(), but stop the thread before
running it.
Compilation fix for WSAGetLastError
git-svn-id: file:///home/svn/framework3/trunk@10415 4d416f70-5f16-0410-b530-b9f4589650da