[ReactNative] include stack in native redboxes

Summary:
@public

Include stack traces in native redboxes (e.g. from RCTLogError).  It's not trivial to get the file names and line numbers for every frame of the stack, but we can get the first one which is nice.

Test Plan: {F22548418}

React/Base/RCTLog.m

@@ -171,7 +171,22 @@ void _RCTLogFormat(
 
       // Log to red box
       if (level >= RCTLOG_REDBOX_LEVEL) {
-        [[RCTRedBox sharedInstance] showErrorMessage:message];
+        NSArray *stackSymbols = [NSThread callStackSymbols];
+        NSMutableArray *stack = [NSMutableArray arrayWithCapacity:(stackSymbols.count - 1)];
+        [stackSymbols enumerateObjectsUsingBlock:^(NSString *frameSymbols, NSUInteger idx, BOOL *stop) {
+          if (idx != 0) { // don't include the current frame
+            NSString *address = [[frameSymbols componentsSeparatedByString:@"0x"][1] componentsSeparatedByString:@" "][0];
+            NSRange addressRange = [frameSymbols rangeOfString:address];
+            NSString *methodName = [frameSymbols substringFromIndex:(addressRange.location + addressRange.length + 1)];
+            if (idx == 1) {
+              NSString *file = [[@(fileName) componentsSeparatedByString:@"/"] lastObject];
+              stack[0] = @{@"methodName": methodName, @"file": file, @"lineNumber": @(lineNumber)};
+            } else {
+              stack[idx - 1] = @{@"methodName": methodName};
+            }
+          }
+        }];
+        [[RCTRedBox sharedInstance] showErrorMessage:message withStack:stack];
       }
 
       // Log to JS executor