[SR-730] Flag to statically link Swift standard library - Swift

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If I build an executable with swiftc:

$ swiftc test.swift

Then I find out the Swift standard library was dynamically linked:

$ otool -L test
@rpath/libswiftCore.dylib (compatibility version 0.0.0, current version 0.0.0)

However, the binary distributions also have a static version that I didn't use:

/Library/Developer/Toolchains/swift-latest.xctoolchain//usr/lib/swift_static/macosx/libswiftCore.a

I want to pass e.g. -static-stdlib to swiftc to compile a program that is statically linked with the Swift standard library.

relates to

SR-648 swift package manager should have the option to produce statically linked binaries

SR-2280 swiftc -static-stdlib option fails on Ubuntu 14.04 & 15.10

SR-727 (emscripten support) Compile Swift code with statically linked stdlib

SR-9821 Swift Static Standard Library is being treated as private api