Merge "Revert "Update soong's go.mod to 1.15.6"" am: 6b2247fbe8 am: 0aab82ffc6

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/1543691

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I394db903910c526f3d327f7dc009da74a8a9d3e2
diff --git a/go.mod b/go.mod
index 117fa65..7297dea 100644
--- a/go.mod
+++ b/go.mod
@@ -8,4 +8,4 @@
 
 replace github.com/google/blueprint v0.0.0 => ../blueprint
 
-go 1.15.6
+go 1.15