Check return code from malloc (#20173)

Summary:
Calls abort() in cases where malloc returns NULL.

Checking the return value from malloc is good practice and is
required to pass a [Veracode security scan](https://www.veracode.com/). This will let
developers who are required to submit their software to Veracode
use React Native.
Pull Request resolved: https://github.com/facebook/react-native/pull/20173

Differential Revision: D9235096

Pulled By: hramos

fbshipit-source-id: 9fdc97f9e84f8d4d91ae59242093907f7a81d286

React/Base/RCTModuleMethod.mm

@@ -302,6 +302,12 @@ RCT_EXTERN_C_END
 
           [argumentBlocks addObject:^(__unused RCTBridge *bridge, NSUInteger index, id json) {
             void *returnValue = malloc(typeSignature.methodReturnLength);
+            if (!returnValue) {
+              // CWE - 391 : Unchecked error condition
+              // https://www.cvedetails.com/cwe-details/391/Unchecked-Error-Condition.html
+              // https://eli.thegreenplace.net/2009/10/30/handling-out-of-memory-conditions-in-c
+              abort();
+            }
             [typeInvocation setArgument:&json atIndex:2];
             [typeInvocation invoke];
             [typeInvocation getReturnValue:returnValue];