Use `/MP` (Build with multiple processes [1]) when compiling on Windows.

I tested a couple of build environments, and enabling this option seems to
improve the build times by ~20-30 seconds.  For example, 4:38 → 4:19.

[1] https://learn.microsoft.com/en-us/cpp/build/reference/mp-build-with-multiple-processes

* build/generator/templates/vcnet_vcxproj.ezt
  (): Enable multi-processor compilation.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1906011 13f79535-47bb-0310-9956-ffa450edef68
1 file changed