(makefile) Dynamically set GOARCH flag while building binaries (#2871)

The GOARCH flag was hardcoded to "386", which causes the binaries to not
work properly on machines with arm64 arch. This PR dynamically sets the
GOARCH flag to arm64 if the machine arch is arm64, or to 386 for all other
arch.

Signed-off-by: anik120 <anikbhattacharya93@gmail.com>

Signed-off-by: anik120 <anikbhattacharya93@gmail.com>

Author: anik120

Makefile

@@ -29,7 +29,11 @@ GO := GO111MODULE=on GOFLAGS="$(MOD_FLAGS)" go
 GINKGO := $(GO) run github.com/onsi/ginkgo/v2/ginkgo
 BINDATA := $(GO) run github.com/go-bindata/go-bindata/v3/go-bindata
 GIT_COMMIT := $(shell git rev-parse HEAD)
-
+ifeq ($(shell arch), arm64) 
+ARCH := arm64
+else
+ARCH := 386
+endif
 # Phony prerequisite for targets that rely on the go build cache to determine staleness.
 .PHONY: build test clean vendor \
 	coverage coverage-html e2e \
@@ -82,15 +86,15 @@ build-coverage: build_cmd=test -c -covermode=count -coverpkg ./pkg/controller/..
 build-coverage: clean $(CMDS)
 
 build-linux: build_cmd=build
-build-linux: arch_flags=GOOS=linux GOARCH=386
+build-linux: arch_flags=GOOS=linux GOARCH=$(ARCH)
 build-linux: clean $(CMDS)
 
 build-wait: clean bin/wait
 
 bin/wait: FORCE
-	GOOS=linux GOARCH=386 go build $(MOD_FLAGS) -o $@ $(PKG)/test/e2e/wait
+	GOOS=linux GOARCH=$(ARCH) go build $(MOD_FLAGS) -o $@ $(PKG)/test/e2e/wait
 
-build-util-linux: arch_flags=GOOS=linux GOARCH=386
+build-util-linux: arch_flags=GOOS=linux GOARCH=$(ARCH)
 build-util-linux: build-util
 
 build-util: bin/cpb