Add intial version for new getstubdll tool
Add a sample definition-file for stub-library generator
opmapi.h fixes.
restore commit 8df1398 functionality (after commit a365aef)
by commenting out the __FAST_MATH__ asm inlines along with
better wording in comments.
unistd.h: Added definitions for SHUT_RD, SHUT_WR and SHUT_RDWR.