Disable cgo by default

[alexshtin]

What changed?
Disable cgo by default.

Why?

When make runs a recipe, variables defined in the makefile are placed into the environment of each shell. This allows you to pass values to sub-make invocations (see Recursive Use of make). By default, only variables that came from the environment or the command line are passed to recursive invocations. You can use the export directive to pass other variables. See Communicating Variables to a Sub-make, for full details.

How did you test it?
Run manually.

Potential risks
No risks.

Is hotfix candidate?
No.