GLog fix on case sensitive APFS macOS

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This will fix compile error on case sensitive APFS(Apple File System) macs.

Integrate  RN on case sensitive formatted macOS via cocoa pods you will get compile errors on the include lines something like :
```
         ^~~~~~~~~~~~~~~~
1 error generated.
** BUILD FAILED **
```

If you change `#include <glog/logging.h>` into `#include <GLog/logging.h>` (replace `glog` with `GLog`) it will fix the build error. After fixing this you will get same kind of errors on a few other places.

[IOS] [BUGFIX] [Framework] - `GLog` fix on case sensitive APFS macOS
Closes https://github.com/facebook/react-native/pull/17697

Differential Revision: D6832740

Pulled By: shergin

fbshipit-source-id: 0c7a01f33fde35dbc8004c5bb6e5b22f8f0ea369

scripts/process-podspecs.sh

@@ -65,7 +65,7 @@ process() {
 cd "$ROOT/third-party-podspecs"
 push Folly.podspec
 push DoubleConversion.podspec
-push GLog.podspec
+push glog.podspec
 
 process "$ROOT/ReactCommon/yoga"
 process "$ROOT" _ignore_me_subspec_for_linting_

third-party-podspecs/Folly.podspec

@@ -10,7 +10,7 @@ Pod::Spec.new do |spec|
   spec.module_name = 'folly'
   spec.dependency 'boost-for-react-native'
   spec.dependency 'DoubleConversion'
-  spec.dependency 'GLog'
+  spec.dependency 'glog'
   spec.compiler_flags = '-DFOLLY_NO_CONFIG -DFOLLY_MOBILE=1 -DFOLLY_USE_LIBCPP=1'
   spec.source_files = 'folly/Bits.cpp',
                       'folly/Conv.cpp',

third-party-podspecs/glog.podspec

@@ -1,5 +1,5 @@
 Pod::Spec.new do |spec|
-  spec.name = 'GLog'
+  spec.name = 'glog'
   spec.version = '0.3.4'
   spec.license = { :type => 'Google', :file => 'COPYING' }
   spec.homepage = 'https://github.com/google/glog'