Ensure third-party-podspecs depend on react_native_pods.rb

These podspecs all depend on a function defined in another Ruby file
(which is kind of scary, but prooobably okay). However, they do not
`require` that file, and instead (previously) were just relying on the
fact that CocoaPods loads all the podspecs declared in your Podfile.

This is fine for `pod install`, but doesn't apply to commands like `pod
ipc spec` (which is used to convert an individual Podspec file to JSON).
With that command, the PodSpecs were not evaluating successfully, as
they didn't have access to this function.

So we add the proper requires here and call it a day.

packages/react-native/third-party-podspecs/DoubleConversion.podspec

@@ -3,6 +3,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+require_relative "../scripts/react_native_pods"
+
 Pod::Spec.new do |spec|
   spec.name = 'DoubleConversion'
   spec.version = '1.1.6'

packages/react-native/third-party-podspecs/RCT-Folly.podspec

@@ -3,6 +3,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+require_relative "../scripts/react_native_pods"
+
 folly_config = get_folly_config()
 folly_compiler_flags = folly_config[:compiler_flags]
 folly_release_version = folly_config[:version]

packages/react-native/third-party-podspecs/boost.podspec

@@ -3,6 +3,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+require_relative "../scripts/react_native_pods"
+
 Pod::Spec.new do |spec|
   spec.name = 'boost'
   spec.version = '1.83.0'

packages/react-native/third-party-podspecs/fmt.podspec

@@ -3,6 +3,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+require_relative "../scripts/react_native_pods"
+
 Pod::Spec.new do |spec|
   spec.name = "fmt"
   spec.version = "9.1.0"

packages/react-native/third-party-podspecs/glog.podspec

@@ -3,6 +3,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+require_relative "../scripts/react_native_pods"
+
 Pod::Spec.new do |spec|
   spec.name = 'glog'
   spec.version = '0.3.5'