Update OpenSSL pod and remove exclude arch setting (#1892)

Summary:
This PR updates the OpenSSL pod and thus updates the corresponding Folly and RSocket pods. The new OpenSSL pod has a support of arm64 artifact for iPhomeSimulators.This PR also updates the replaces the libevent pod which didn't work with arm64 arch for iPhoneSimulator.

## Changelog

- Update OpenSSL pod
- Update Folly dep
- Update RSocket dep
- Replace Libevent pod.

Pull Request resolved: https://github.com/facebook/flipper/pull/1892

Test Plan: CI

Reviewed By: mweststrate

Differential Revision: D26229304

Pulled By: priteshrnandgaonkar

fbshipit-source-id: 46256d9cd3e0cf5aab6e477e612c3bcb77e31627

iOS/Sample/Podfile

@@ -3,7 +3,7 @@ source 'https://github.com/facebook/flipper.git'
 source 'https://github.com/CocoaPods/Specs'
 
 target 'Sample' do
-  platform :ios, '9.0'
+  platform :ios, '10.0'
 
   # See docs/getting-started/ios-native.mdx
   pod 'FlipperKit', :path => '../../FlipperKit.podspec', :configuration => 'Debug'
@@ -17,7 +17,7 @@ target 'Sample' do
   pod 'Flipper-Folly', :configuration => 'Debug'
   pod 'Flipper-Glog', :configuration => 'Debug'
   pod 'Flipper-PeerTalk', :configuration => 'Debug'
-  pod 'CocoaLibEvent', :configuration => 'Debug'
+  pod 'libevent', :configuration => 'Debug'
   pod 'boost-for-react-native', :configuration => 'Debug'
   pod 'OpenSSL-Universal', :configuration => 'Debug'
   pod 'CocoaAsyncSocket', :configuration => 'Debug'