Revert "Drop --sanitize=thread"

This reverts commit 466b6db.

# Conflicts:
#	Makefile

Author: finestructure

Makefile

@@ -35,7 +35,7 @@ run:
 
 test:
 	set -o pipefail \
-	&& swift test --disable-automatic-resolution
+	&& swift test --disable-automatic-resolution --sanitize=thread
 
 test-query-performance:
 	set -o pipefail \