use a separate prefix enabled method instead of changing the ABI of cppuhelper
also - lookup the prefix in the dllcomponentloader in case we are called this way
also - add a unit test for the prefix change

we need to save the information if we have a global range name or a
local range name in the uno api too

Don't use any i prefix for import library, and deliver it.

I don't really see the point in having the UDK_MAJOR in the import
library name. We don't do that for any Unix either, just -lstore is
used. It isn't as if it would make any sense in keeping a mix of
(import) libraries for incompatible versions/builds of the LO (SDK) in
the same location anyway. The simpler, the better.

This partially reverts commit d7bc3048ee87ca5cb190fe8236b354db9b9ef39e
"Remove OS/2 support."

checknewapi.pl can run regview fine on Windows even if the name
doesn't include the .exe suffix. So drop the use of EXECPOST and then
this will work also in the case of cross-compilation to Windows, where
EXECPOST is .exe for HOST, but we aren't running a HOST regview but a
BUILD one.