python-async-timeout: update to 5.0.1

Update package to 5.0.1.

Add PYPI_SOURCE_NAME since PyPI switched sdist filename to use
underscores (async_timeout-5.0.1.tar.gz).

Add test.sh to verify timeout context manager functionality.

Signed-off-by: Alexandru Ardelean <alex@shruggie.ro>

lang/python/python-async-timeout/test.sh

@@ -0,0 +1,32 @@
+#!/bin/sh
+[ "$1" = python3-async-timeout ] || exit 0
+
+python3 - << 'EOF'
+import asyncio
+import async_timeout
+
+async def test_no_timeout():
+    async with async_timeout.timeout(10):
+        await asyncio.sleep(0)
+    print("no_timeout OK")
+
+async def test_timeout_fires():
+    try:
+        async with async_timeout.timeout(0.01):
+            await asyncio.sleep(1)
+        assert False, "Should have timed out"
+    except asyncio.TimeoutError:
+        print("timeout_fires OK")
+
+async def test_timeout_none():
+    async with async_timeout.timeout(None):
+        await asyncio.sleep(0)
+    print("timeout_none OK")
+
+async def main():
+    await test_no_timeout()
+    await test_timeout_fires()
+    await test_timeout_none()
+
+asyncio.run(main())
+EOF