Compact ILAsm/ILDasm for DllExport

[3F]

Please follow the readme info: https://github.com/3F/coreclr#coreclr-ilasm

Modern releases:

• GitHub Releases (with PDB ~240 MB+): https://github.com/3F/coreclr/releases
• NuGet packages with additional MSBuild Properties: https://www.nuget.org/packages/ILAsm

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I will temporarily provide my own binaries for DllExport project. This especially is needed for something like this:

• DLL Export conflicts with Fody in Visual Studio 2015 DllExport#17

etc.

by the way, the open coreclr repo (latest commits and tags) contains max v4.5.22220. I don't know where placed src for v4.6.1055.0
upd:

• "\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.6 Tools\x64\ildasm.exe" - v4.6.1055.0
• "\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe" - v4.6.1038.0

CI: https://ci.appveyor.com/project/3Fs/coreclr/history

Latest binaries:

Architecture	Platform	Config	commit-sha1	ILD/Asm	coreclr	Binaries
x86	Windows	Release	05afa4f	[ 4.5.1 ] -> *4.5.22220.0	*v1.0.4	Download
x64	Windows	Release	05afa4f	[ 4.5.1 ] -> *4.5.22220.0	*v1.0.4	Download

* - The base of version, i.e. it can be different from official release

NuGet:

• 

Still TODO:

• Support for roslyn DllExport#4