Add build script

[t-mat]

Hi, thanks for this very useful utility!

This PR adds trivial build scripts for x64 and x86.

They can be invoked by the following commands:

cmd.exe
cd /d PATH\TO\NtTrace
.\scripts\build-vs-x64.bat
.\scripts\build-vs-x86.bat

You can test this PR with the following commands:

cmd.exe
cd /d "%PUBLIC%\Documents"
git clone https://github.com/rogerorr/NtTrace.git NtTrace-PR11
cd NtTrace-PR11

git pull origin pull/11/head
git log -1

.\scripts\build-vs-x64.bat
.\NtTrace.exe .\NtTrace.exe > nt-trace-x64.log

.\scripts\build-vs-x86.bat
.\NtTrace.exe .\NtTrace.exe > nt-trace-x86.log