Add new submodules for port contribution (#355)

* Add new submodules

* Update submodule location
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..e7ef2b0
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "ThirdParty/FreeRTOS-Kernel-Partner-Supported-Ports"]
+	path = ThirdParty/Partner-Supported-Ports
+	url = https://github.com/FreeRTOS/FreeRTOS-Kernel-Partner-Supported-Ports
+[submodule "ThirdParty/FreeRTOS-Kernel-Community-Supported-Ports"]
+	path = ThirdParty/Community-Supported-Ports
+	url = https://github.com/FreeRTOS/FreeRTOS-Kernel-Community-Supported-Ports
diff --git a/ThirdParty/Community-Supported-Ports b/ThirdParty/Community-Supported-Ports
new file mode 160000
index 0000000..f0618d9
--- /dev/null
+++ b/ThirdParty/Community-Supported-Ports
@@ -0,0 +1 @@
+Subproject commit f0618d9e2f4c5b0a3e472a2673a090e8ef836258
diff --git a/ThirdParty/Partner-Supported-Ports b/ThirdParty/Partner-Supported-Ports
new file mode 160000
index 0000000..91c8741
--- /dev/null
+++ b/ThirdParty/Partner-Supported-Ports
@@ -0,0 +1 @@
+Subproject commit 91c87416f8810bb60090baf3abd351f997e8fab4