use MSVC's /Zc:inline option to reduce binary size

If I'm getting it right, MSVC has a non-conforming feature
that allows to declare a function as inline without defining its
body in the header, and it'll work if the function is actually
emitted elsewhere, and the linker will sort it out. This seems
to be implemented by forcing emitting of out-of-line copies
of all inline functions, which is wasteful. /Zc:inline disables
this useless feature, which seems to save quite some space
(optimized build, starmath's .o files 350k->220k, smlo.dll
2.5M->2.2M).

The docs don't say anything about binary compatibility,
but treat it the same way as -Zc:dllexportInlines, just in case.

This change also may help avoid the tdf#144598 problem for our
AVX/etc. code, such as in Calc.

Change-Id: I73cc5d46ba1e4245e8d3b6688804c2b9684d2f9a
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/122334
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>

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