Set TMPDIR under Windows
Set TMPDIR under Windows

Bazel might find a non writeable temp directory so force it
to be in C:\bazel_ci\temp in the same way than for the Bazel job.

Discovered in #43.

Change-Id: I8c1eaac80f7b92049343fa45086053791b6648eb

bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration