Bump the process submodule

This should fix the #17108 and #17249 with the fix from https://github.com/haskell/process/pull/159.

Bump the process submodule
601e554c · Ben Gamari · Marge Bot · d0ef8312 · e6b45f93 · b8a78085
Commit 601e554c authored 5 years ago by Ben Gamari Committed by Marge Bot 5 years ago
--- a/process @ e6b45f93
+++ b/process @ e6b45f93
-Subproject commit b8a780852541669a86a1891af20d58c1d4d65ce6
+Subproject commit e6b45f933cb4d0213d588a7f73bfde16cf93e589