[doc]: add build badge for 201712 release (#1510)

Signed-off-by: Guohan Lu <[email protected]>

Author: lguohan

README.md

@@ -4,12 +4,20 @@ Nephos: [![Nephos](https://sonic-jenkins.westus2.cloudapp.azure.com/job/nephos/j
 P4: [![P4](https://sonic-jenkins.westus2.cloudapp.azure.com/job/p4/job/buildimage-p4-all/badge/icon)](https://sonic-jenkins.westus2.cloudapp.azure.com/job/p4/job/buildimage-p4-all)
 VS: [![VS](https://sonic-jenkins.westus2.cloudapp.azure.com/job/vs/job/buildimage-vs-all/badge/icon)](https://sonic-jenkins.westus2.cloudapp.azure.com/job/vs/job/buildimage-vs-all)
 
+*201712*:
+Broadcom: [![Broadcom](https://sonic-jenkins.westus2.cloudapp.azure.com/job/broadcom/job/buildimage-brcm-201712/badge/icon)](https://sonic-jenkins.westus2.cloudapp.azure.com/job/broadcom/job/buildimage-brcm-201712/)
+Barefoot: [![Mellanox](https://sonic-jenkins.westus2.cloudapp.azure.com/job/barefoot/job/buildimage-bf-201712/badge/icon)](https://sonic-jenkins.westus2.cloudapp.azure.com/job/barefoot/job/buildimage-bf-201712/)
+Centec: [![Centec](https://sonic-jenkins.westus2.cloudapp.azure.com/job/centec/job/buildimage-centec-201712/badge/icon)](https://sonic-jenkins.westus2.cloudapp.azure.com/job/centec/job/buildimage-centec-201712/)
+Nephos: [![Nephos](https://sonic-jenkins.westus2.cloudapp.azure.com/job/nephos/job/buildimage-nephos-201712/badge/icon)](https://sonic-jenkins.westus2.cloudapp.azure.com/job/nephos/job/buildimage-nephos-201712/)
+Marvell: [![Marvell](https://sonic-jenkins.westus2.cloudapp.azure.com/job/marvell/job/buildimage-mrvl-201712/badge/icon)](https://sonic-jenkins.westus2.cloudapp.azure.com/job/marvell/job/buildimage-mrvl-201712/)
+Mellanox: [![Mellanox](https://sonic-jenkins.westus2.cloudapp.azure.com/job/mellanox/job/buildimage-mlnx-201712/badge/icon)](https://sonic-jenkins.westus2.cloudapp.azure.com/job/mellanox/job/buildimage-mlnx-201712/)
+
 *201709*: 
 Broadcom: [![Broadcom](https://sonic-jenkins.westus2.cloudapp.azure.com/job/broadcom/job/buildimage-brcm-201709/badge/icon)](https://sonic-jenkins.westus2.cloudapp.azure.com/job/broadcom/job/buildimage-brcm-201709/)
-Cavium: [![Cavium](https://sonic-jenkins.westus2.cloudapp.azure.com/job/cavium/job/buildimage-cavm-all/badge/icon)](https://sonic-jenkins.westus2.cloudapp.azure.com/job/cavium/job/buildimage-cavm-all/)
-Centec: [![Centec](https://sonic-jenkins.westus2.cloudapp.azure.com/job/centec/job/buildimage-centec-all/badge/icon)](https://sonic-jenkins.westus2.cloudapp.azure.com/job/centec/job/buildimage-centec-all/)
+Cavium: [![Cavium](https://sonic-jenkins.westus2.cloudapp.azure.com/job/cavium/job/buildimage-cavm-201709/badge/icon)](https://sonic-jenkins.westus2.cloudapp.azure.com/job/cavium/job/buildimage-cavm-201709/)
+Centec: [![Centec](https://sonic-jenkins.westus2.cloudapp.azure.com/job/centec/job/buildimage-centec-201709/badge/icon)](https://sonic-jenkins.westus2.cloudapp.azure.com/job/centec/job/buildimage-centec-201709/)
 Nephos: [![Nephos](https://sonic-jenkins.westus2.cloudapp.azure.com/job/nephos/job/buildimage-nephos-201709/badge/icon)](https://sonic-jenkins.westus2.cloudapp.azure.com/job/nephos/job/buildimage-nephos-201709/)
-Marvell: [![Marvell](https://sonic-jenkins.westus2.cloudapp.azure.com/job/marvell/job/buildimage-mrvl-all/badge/icon)](https://sonic-jenkins.westus2.cloudapp.azure.com/job/marvell/job/buildimage-mrvl-all/)
+Marvell: [![Marvell](https://sonic-jenkins.westus2.cloudapp.azure.com/job/marvell/job/buildimage-mrvl-201709/badge/icon)](https://sonic-jenkins.westus2.cloudapp.azure.com/job/marvell/job/buildimage-mrvl-201709/)
 Mellanox: [![Mellanox](https://sonic-jenkins.westus2.cloudapp.azure.com/job/mellanox/job/buildimage-mlnx-201709/badge/icon)](https://sonic-jenkins.westus2.cloudapp.azure.com/job/mellanox/job/buildimage-mlnx-201709/)
 
 # sonic-buildimage