- Move some functions from stubs.c to new file eng/mapping.c

- Move some functions from stubs.c to new file eng/mapping.c
- Move EngSetPointerTag to mouse.c
- Move EngQuerySystemAttribute and EngGetTickCount to engmisc.c
- Unimplement EngLoadModule as it was wrong
- FLOATOBJ_XxxFloatObj are duplicated from FLOATOBJ_Xxx, remove the stubs and redirect in the pspec.
- Redirect EngGetCurrentProcessId and EngGetcurrentThreadId to ntoskrnl

svn path=/trunk/; revision=42601