Add Nasm to Pre-installed software

[EwoutH]

Nasm is used for a lot of high-performance projects with SIMD assembly code. It's a very small and quick install but adds a lot of extra code. Having it installed by default would be very useful.

[EwoutH]

@IlyaFinkelshteyn What do you think?

[EwoutH]

@IlyaFinkelshteyn Could you take a second look at this? Nasm is a very small package (<1MB) which simplifies compiling many high-performance libraries.

Builds: https://www.nasm.us/pub/nasm/releasebuilds/2.14.02/

[GitMensch]

In the meantime that link is a bit outdated https://www.nasm.us/pub/nasm/releasebuilds/?C=M;O=D may be preferable.

As an alternative to the pre-installation one may use:

• nasm from cygwin/msys2
• yasm from cygwin/msys2 (with and adjustment in the build scripts)

• manually download, unpack and place in PATH, example for CMD:

  rem have NASM_VERSION in environment vars, for example as 2.15.05
  rem have NASM_ARCHIVE in environment vars, as nasm-%NASM_VERSION%-win64.zip
  rem have %NASM_ARCHIVE% in cached files
  if not exist "%NASM_ARCHIVE%"  appveyor DownloadFile "https://www.nasm.us/pub/nasm/releasebuilds/%NASM_VERSION%/win64/%NASM_ARCHIVE%"
  7z e "%NASM_ARCHIVE%"          1>NUL
  move nasm*.exe tools           1>NUL
  set "PATH=%CD%\tools;%PATH%"
  
  rem have YASM_ARCHIVE in environment var, for example as yasm-1.3.0-win64.exe
  rem have %YASM_ARCHIVE% in cached files
  if not exist "%NASM_ARCHIVE%"  appveyor DownloadFile "http://www.tortall.net/projects/yasm/releases/%YASM_ARCHIVE%"
  copy yasm*.exe tools\yasm.exe  1>NUL
  set "PATH=%CD%\tools;%PATH%"

[gengjiawen]

+1 from me, Node.js rely on this. I use choco to install it every time.