build: do the innie builds concurrently
for SPEED
diff --git a/build/innie.sh b/build/innie.sh
index b353f42..bbf8825 100755
--- a/build/innie.sh
+++ b/build/innie.sh
@@ -1,5 +1,6 @@
#!/bin/bash
set -e
-CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags="${LDFLAGS:-}" -tags=innie -o embedded/sketch-linux/sketch-linux-amd64 ./cmd/sketch
-CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build -ldflags="${LDFLAGS:-}" -tags=innie -o embedded/sketch-linux/sketch-linux-arm64 ./cmd/sketch
+CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags="${LDFLAGS:-}" -tags=innie -o embedded/sketch-linux/sketch-linux-amd64 ./cmd/sketch &
+CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build -ldflags="${LDFLAGS:-}" -tags=innie -o embedded/sketch-linux/sketch-linux-arm64 ./cmd/sketch &
+wait