Fix Hermes build on folly 2021.04.26.00

Summary:
This fixes multiple compile errors when building RNTester with Hermes enabled:
- `Typedef redefinition with different types ('uint8_t' (aka 'unsigned char') vs 'enum clockid_t')`
- `'event2/event-config.h' file not found`
- tons of missing files (all added to RCT-Folly/Futures)

Changelog: [iOS] Fix Hermes build on folly version 2021.04.26.00
allow-large-files

Reviewed By: RSNara

Differential Revision: D28128087

fbshipit-source-id: ee7cb6fda72d00d22f6182d958aa8ba55939f158

Author: Peter Argany

ReactCommon/hermes/React-hermes.podspec

@@ -16,7 +16,7 @@ else
   source[:tag] = "v#{version}"
 end
 
-folly_compiler_flags = '-DFOLLY_NO_CONFIG -DFOLLY_MOBILE=1 -DFOLLY_USE_LIBCPP=1 -Wno-comma -Wno-shorten-64-to-32'
+folly_compiler_flags = '-DFOLLY_NO_CONFIG -DFOLLY_MOBILE=1 -DFOLLY_USE_LIBCPP=1 -DFOLLY_HAVE_CLOCK_GETTIME=1 -Wno-comma -Wno-shorten-64-to-32'
 folly_version = '2021.04.26.00'
 boost_compiler_flags = '-Wno-documentation'
 
@@ -36,7 +36,7 @@ Pod::Spec.new do |s|
   s.public_header_files    = "executor/HermesExecutorFactory.h"
   s.compiler_flags         = folly_compiler_flags + ' ' + boost_compiler_flags
   s.pod_target_xcconfig    = {
-                               "HEADER_SEARCH_PATHS" => "\"$(PODS_TARGET_SRCROOT)/..\" \"$(PODS_ROOT)/boost-for-react-native\" \"$(PODS_ROOT)/RCT-Folly\" \"$(PODS_ROOT)/DoubleConversion\"",
+                               "HEADER_SEARCH_PATHS" => "\"$(PODS_TARGET_SRCROOT)/..\" \"$(PODS_ROOT)/boost-for-react-native\" \"$(PODS_ROOT)/RCT-Folly\" \"$(PODS_ROOT)/DoubleConversion\" \"$(PODS_ROOT)/libevent/include\"",
                                "GCC_PREPROCESSOR_DEFINITIONS" => "HERMES_ENABLE_DEBUGGER=1",
                              }
   s.header_dir             = "reacthermes"
@@ -46,8 +46,8 @@ Pod::Spec.new do |s|
   s.dependency "React-jsinspector", version
   s.dependency "React-perflogger", version
   s.dependency "RCT-Folly", folly_version
-  s.dependency "RCT-Folly/Futures", folly_version
   s.dependency "DoubleConversion"
   s.dependency "glog"
+  s.dependency "RCT-Folly/Futures", folly_version
   s.dependency "hermes-engine"
 end

packages/rn-tester/Podfile.lock

@@ -857,7 +857,7 @@ SPEC CHECKSUMS:
   glog: 5337263514dd6f09803962437687240c5dc39aa4
   libevent: 4049cae6c81cdb3654a443be001fb9bdceff7913
   OpenSSL-Universal: 1aa4f6a6ee7256b83db99ec1ccdaa80d10f9af9b
-  RCT-Folly: ed150a9621ca98972042998fa33bdfed325c2801
+  RCT-Folly: c2df3efe85970e635de36ef663ce1e98a1c84981
   RCTRequired: af2d6080a4b9ba0885b28ca78879a92066c71cab
   RCTTypeSafety: f5405e0143bb2addae97ce33e4c87d9284a48fe2
   React: f64c9f6db5428717922a3292ba6a448615a2e143