Makefile: emit builds for various platforms and architectures

Signed-off-by: Rohit Yadav <rohit@apache.org>
diff --git a/Makefile b/Makefile
index 0a0beca..92a8885 100644
--- a/Makefile
+++ b/Makefile
@@ -51,10 +51,13 @@
 dist: all
 	rm -fr dist
 	mkdir -p dist
-	GOOS=linux   GOARCH=amd64 $(GO) build -mod=vendor -ldflags='-s -w -X main.GitSHA=$(GIT_SHA) -X main.BuildDate=$(DATE)' -o dist/cmk.linux.amd64 cmk.go
+	GOOS=linux   GOARCH=amd64 $(GO) build -mod=vendor -ldflags='-s -w -X main.GitSHA=$(GIT_SHA) -X main.BuildDate=$(DATE)' -o dist/cmk.linux.x86-64 cmk.go
+	GOOS=linux   GOARCH=386 $(GO) build -mod=vendor -ldflags='-s -w -X main.GitSHA=$(GIT_SHA) -X main.BuildDate=$(DATE)' -o dist/cmk.linux.x86 cmk.go
 	GOOS=linux   GOARCH=arm $(GO) build -mod=vendor -ldflags='-s -w -X main.GitSHA=$(GIT_SHA) -X main.BuildDate=$(DATE)' -o dist/cmk.linux.arm32 cmk.go
-	GOOS=windows GOARCH=amd64 $(GO) build -mod=vendor -ldflags='-s -w -X main.GitSHA=$(GIT_SHA) -X main.BuildDate=$(DATE)' -o dist/cmk.exe cmk.go
-	GOOS=darwin  GOARCH=amd64 $(GO) build -mod=vendor -ldflags='-s -w -X main.GitSHA=$(GIT_SHA) -X main.BuildDate=$(DATE)' -o dist/cmk.darwin.amd64 cmk.go
+	GOOS=linux   GOARCH=arm64 $(GO) build -mod=vendor -ldflags='-s -w -X main.GitSHA=$(GIT_SHA) -X main.BuildDate=$(DATE)' -o dist/cmk.linux.arm64 cmk.go
+	GOOS=windows GOARCH=386 $(GO) build -mod=vendor -ldflags='-s -w -X main.GitSHA=$(GIT_SHA) -X main.BuildDate=$(DATE)' -o dist/cmk.windows.x86.exe cmk.go
+	GOOS=windows GOARCH=amd64 $(GO) build -mod=vendor -ldflags='-s -w -X main.GitSHA=$(GIT_SHA) -X main.BuildDate=$(DATE)' -o dist/cmk.windows.x86-64.exe cmk.go
+	GOOS=darwin  GOARCH=amd64 $(GO) build -mod=vendor -ldflags='-s -w -X main.GitSHA=$(GIT_SHA) -X main.BuildDate=$(DATE)' -o dist/cmk.darwin.x86-64 cmk.go
 
 # Tools