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Revert the main logic change of commit v3.9.0-rc1~192^2 (bindexplib: fix
constants symbols export, 2017-04-26) and its test case. Unfortunately
some constants may be provided by multiple object files with different
`@...` suffixes, leading to ambiguous references. Revert support
pending further investigation.
Fixes: #17045
Create target property WINDOWS_EXPORT_ALL_SYMBOLS to automatically
generate a module definition file from MS-compatible .obj files and give
it to the linker in order to export all symbols from the .dll part of a
SHARED library.
