kernel32/tests : added tests for copyfileex try7

[Patrick Rudolph]

try2:
check the os version in case of PROGRESS_STOP

try3:
do not use os version info, instead mark tests on win2k and winxp as 
broken

try4:
fix possible linking errors

try5:
fix GetTempFileNameA
Dont write dummy data to file, just set file size using 
SetFilePointerEx and SetEndOfFile
remove threadid testing
added tests for cancelFlag pointer
added tests for flag COPY_FILE_FAIL_IF_EXISTS
added more comments

try6:
fix failing test

try7:
prevent crash on Win2000
fix whitespace error
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