coverage: updated 'go test' command to include all packages

previously the coverage for each package only included lines covered by tests in the same package,
excluding end-to-end tests
now, we get very different coverage numbers...

Makefile

@@ -72,9 +72,9 @@ godoc:
 	godoc -http=:33333
 
 coverage:
-	go test --coverprofile tmp.cov github.com/kopia/kopia/...
+	go test --coverprofile tmp.cov --coverpkg github.com/kopia/kopia/... github.com/kopia/kopia/...
 	go tool cover -html=tmp.cov
 
 coverage-repo:
-	go test --coverprofile tmp.cov github.com/kopia/kopia/repo/...
+	go test --coverprofile tmp.cov --coverpkg github.com/kopia/kopia/repo/... github.com/kopia/kopia/repo/...
 	go tool cover -html=tmp.cov

repo/tests/repository_stress_test/repository_stress.go

@@ -0,0 +1,3 @@
+package repositorystress
+
+// dummy package

repo/tests/repository_stress_test/repository_stress_test.go

@@ -1,4 +1,4 @@
-package block_manager_stress_test
+package repositorystress_test
 
 import (
 	"context"

repo/tests/stress_test/stress.go

@@ -0,0 +1,3 @@
+package stress
+
+// dummy package

tests/end_to_end_test/end_to_end.go

@@ -0,0 +1 @@
+package endtoend

tests/end_to_end_test/end_to_end_test.go

@@ -1,4 +1,4 @@
-package tests
+package endtoend_test
 
 import (
 	"encoding/hex"