Update gitmodules ref to msft repo. (sonic-net#488)

Author: liushilongbuaa

.gitmodules

@@ -3,13 +3,13 @@
 	url = https://github.com/sonic-net/sonic-swss-common
 [submodule "sonic-linux-kernel"]
 	path = src/sonic-linux-kernel
-	url = https://github.com/sonic-net/sonic-linux-kernel
+	url = https://github.com/Azure/sonic-linux-kernel.msft
 [submodule "sonic-sairedis"]
 	path = src/sonic-sairedis
-	url = https://github.com/sonic-net/sonic-sairedis
+	url = https://github.com/Azure/sonic-sairedis.msft
 [submodule "sonic-swss"]
 	path = src/sonic-swss
-	url = https://github.com/sonic-net/sonic-swss
+	url = https://github.com/Azure/sonic-swss.msft
 [submodule "src/p4c-bm/p4c-bm"]
 	path = platform/p4/p4c-bm/p4c-bm
 	url = https://github.com/krambn/p4c-bm
@@ -30,16 +30,16 @@
 	url = https://github.com/p4lang/ptf.git
 [submodule "src/sonic-utilities"]
 	path = src/sonic-utilities
-	url = https://github.com/sonic-net/sonic-utilities
+	url = https://github.com/Azure/sonic-utilities.msft
 [submodule "platform/broadcom/sonic-platform-modules-arista"]
 	path = platform/broadcom/sonic-platform-modules-arista
 	url = https://github.com/aristanetworks/sonic
 [submodule "src/sonic-platform-common"]
 	path = src/sonic-platform-common
-	url = https://github.com/sonic-net/sonic-platform-common
+	url = https://github.com/Azure/sonic-platform-common.msft
 [submodule "src/sonic-platform-daemons"]
 	path = src/sonic-platform-daemons
-	url = https://github.com/sonic-net/sonic-platform-daemons
+	url = https://github.com/Azure/sonic-platform-daemons.msft
 [submodule "src/sonic-platform-pde"]
 	path = src/sonic-platform-pde
 	url = https://github.com/sonic-net/sonic-platform-pdk-pde