Merge pull request #14898 from detailyang/patch-1

Makefile: call shell function to get pwd

Makefile

@@ -8,7 +8,7 @@
 .PHONY: geth-darwin geth-darwin-386 geth-darwin-amd64
 .PHONY: geth-windows geth-windows-386 geth-windows-amd64
 
-GOBIN = $(pwd)/build/bin
+GOBIN = $(shell pwd)/build/bin
 GO ?= latest
 
 geth: