.builds: don't set EGL_PLATFORM for chrome tests

EGL_PLATFORM=surfaceless allows rendering tests to complete in headless
mode. However, the headless chrome tests fail with that setting. Change
the linux builder to only set the variable when needed.

Enable verbose output of tests while here. We can keep an eye on skipped
tests that way.

Signed-off-by: Elias Naur <mail@eliasnaur.com>

.builds/openbsd.yml

@@ -15,7 +15,7 @@ tasks:
      ./make.bash
  - test_gio: |
      cd gio
-     go test ./...
+     go test -v ./...
  - test_cmd: |
      cd gio/cmd
-     go test ./...
+     go test -v ./...