Fix #5384 by checking in iOS pod manifest (#5388)

packages/flutter_tools/templates/create/ios.tmpl/Pods/Manifest.lock

diff --git a/packages/flutter_tools/templates/create/ios.tmpl/Pods/Manifest.lock b/packages/flutter_tools/templates/create/ios.tmpl/Pods/Manifest.lock
new file mode 100644
index 0000000..5f093f3
--- /dev/null
+++ b/packages/flutter_tools/templates/create/ios.tmpl/Pods/Manifest.lock
@@ -0,0 +1,3 @@
+PODFILE CHECKSUM: fe68fbd35e5bc75c5acdec41319edc0cdaebd038
+
+COCOAPODS: 1.0.1