[SR-2005] support static libraries for Windows

[compnerd]

Previous ID	SR-2005
Radar	None
Original Reporter	@compnerd
Type	Bug

Additional Detail from JIRA

Votes	0
Component/s
Labels	Bug, CMake
Assignee	None
Priority	Medium

md5: b1c56ee3462f75b4b524d54874be7d1c

Issue Description:

Currently, we can only generate shared libraries for windows in the swift build due to the dllimport/dllexport semantics being mis-applied when doing a static build.

[belkadan]

Note that we don't even have a static library design on other platforms yet. We just happen to ship them.

[swift-ci]

Comment by Muhammad Mominul Huque (JIRA)

@belkadan so I am facing the bug because of this reason?