Help CocoaPods find our missing header file

Compiling with `use_frameworks!` exposes the fact that we forgot to include zcashlc.h in our podspec. Move it to a better location, then add it in.

.gitignore

@@ -2,6 +2,7 @@
 /android/build/
 /ios/libzcashlc.xcframework/
 /ios/ZCashLightClientKit/
+/ios/zcashlc.h
 /lib/
 /tmp/
 

react-native-zcash.podspec

@@ -19,6 +19,7 @@ Pod::Spec.new do |s|
     "ios/react-native-zcash-Bridging-Header.h",
     "ios/RNZcash.m",
     "ios/RNZcash.swift",
+    "ios/zcashlc.h",
     "ios/ZCashLightClientKit/**/*.swift"
   s.resource_bundles = {
     "zcash-mainnet" => "ios/ZCashLightClientKit/Resources/checkpoints/mainnet/*.json",

scripts/updateSources.ts

@@ -114,7 +114,7 @@ async function copySwift(): Promise<void> {
 
   // Copy the Rust header into the Swift location:
   await disklet.setText(
-    'ios/ZCashLightClientKit/Rust/zcashlc.h',
+    'ios/zcashlc.h',
     await disklet.getText(
       'tmp/zcash-light-client-ffi/releases/XCFramework/libzcashlc.xcframework/ios-arm64/libzcashlc.framework/Headers/zcashlc.h'
     )