Add buildvcs=false to Makefile

The buildvcs flag indicates whether to stamp binaries with version control information. Disabling it is needed for the arm runner to work.

Signed-off-by: Ashwin Gopalan <agopalan@berkeley.edu>

Makefile

@@ -1,7 +1,7 @@
 all: trust
 
 trust: cmd/trust/*.go pkg/trust/*.go pkg/printdirtree/*.go
-	go build -o trust ./cmd/trust/
+	go build -buildvcs=false -o trust ./cmd/trust/
 
 clean:
 	rm -f trust