Python runner target resolution on Windows
Python runner target resolution on Windows

This change "fixes" the GN Python script runner's binary target
resolution on Windows absolute paths that contain colons.

Change-Id: Idc914c5619e777bf69ad6d063b690d3693629646

google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed