Disable CxxFrameHandler4 (#4805)

* Disable CxxFrameHandler4

V142 Build tools turn on FH4 (CxxFrameHandler4) by default. This reduces the size of EH maps, but leads to incompatibility with code compiled using older toolsets.

Disable FH4 until consumers (i.e. Office) are on an ABI-safe API or are updated.

Microsoft.ReactNative.dll x64 Release Size:
Before: 2,139 KB
After: 2,294 KB

* Change files

change/react-native-windows-2020-05-06-05-03-56-no-fh4.json

@@ -0,0 +1,8 @@
+{
+  "type": "prerelease",
+  "comment": "Disable CxxFrameHandler4",
+  "packageName": "react-native-windows",
+  "email": "[email protected]",
+  "dependentChangeType": "patch",
+  "date": "2020-05-06T12:03:56.512Z"
+}

vnext/PropertySheets/React.Cpp.props

@@ -103,6 +103,19 @@
     </ClCompile>
   </ItemDefinitionGroup>
 
+  <!--
+    #4804: CxxFrameHandler4 leads to generated code that incompatible with VS
+    2015 and 2017. Disable it until consumers are updated or on an ABI-safe API
+  -->
+  <ItemDefinitionGroup>
+    <ClCompile>
+      <AdditionalOptions>/d2FH4- %(AdditionalOptions)</AdditionalOptions>
+    </ClCompile>
+    <Link>
+      <AdditionalOptions>/d2:-FH4- %(AdditionalOptions)</AdditionalOptions>
+    </Link>
+  </ItemDefinitionGroup>
+
   <ItemDefinitionGroup Condition="'$(ConfigurationType)' == 'Application' OR '$(ConfigurationType)' == 'DynamicLibrary'">
     <Link>
       <SubSystem>Console</SubSystem>