[pathkit] update to build with emsdk 2.0.6

Change-Id: I8df13d592abcd7e2b396250293b57037d2b4b774
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/324117
Reviewed-by: Kevin Lubick <kjlubick@google.com>
2 files changed