Add cygwin option for compilation (#1230)

Add Cygwin option for compilation

FreeRTOS/Demo/Posix_GCC/.vscode/launch.json

@@ -30,6 +30,19 @@
             "MIMode": "gdb",
             "preLaunchTask": "${defaultBuildTask}"
         },
+        {
+            "name": "Launch GDB Cygwin",
+            "type": "cppdbg",
+            "request": "launch",
+            "program": "${workspaceFolder}/build/posix_demo",
+            "args": [],
+            "stopAtEntry": true,
+            "cwd": "${workspaceFolder}",
+            "environment": [],
+            "externalConsole": true,
+            "MIMode": "gdb",
+            "preLaunchTask": "${defaultBuildTask}"
+        },
         {
             "name": "Launch GDB MSYS2",
             "type": "cppdbg",

FreeRTOS/Demo/Posix_GCC/.vscode/settings.json

@@ -10,6 +10,14 @@
                 "MSYSTEM": "MSYS",
                 "CHERE_INVOKING": "1",
             }
+        },
+        "Cygwin": {
+            "path": "C:\\cygwin64\\bin\\bash.exe",
+            "args": ["--login", "-i"],
+            "env": {
+                "MSYSTEM": "Cygwin",
+                "CHERE_INVOKING": "1",
+            }
         }
     },
     "terminal.integrated.defaultProfile.windows": "MSYS2",