Additional ESXi updates (#230)

- Added upstream packer install link to README.md.
- Added -enable-kvm qemu argument to prevent host requires kvm of hvf
error on build.

vmware-esxi/README.md

@@ -26,7 +26,7 @@
 * qemu-block-extra
 * qemu-system-x86
 * qemu-utils
-* Packer - from upstream repository, v1.9.0 or newer
+* Packer - Install from [upstream repository](https://developer.hashicorp.com/packer/install), v1.9.0 or newer
 * The VMware ESXi installation ISO must be downloaded manually. You can download it [here.](https://www.vmware.com/go/get-free-esxi)
 
 ## Requirements (to deploy the image)

vmware-esxi/vmware-esxi.pkr.hcl

@@ -33,7 +33,7 @@ source "qemu" "esxi" {
   iso_url          = var.vmware_esxi_iso_path
   memory           = 4096
   net_device       = "vmxnet3"
-  qemuargs         = [["-cpu", "host"], ["-smp", "2,sockets=2,cores=1,threads=1"], ["-serial", "stdio"]]
+  qemuargs         = [["-cpu", "host"], ["-smp", "2,sockets=2,cores=1,threads=1"], ["-serial", "stdio"], ["-enable-kvm"]]
   shutdown_timeout = var.timeout
 }