[CI] iOS build breaking

[Dmitry Blotsky]

https://ci.apache.org/builders/cordova-ios/builds/36/steps/running-tests/logs/stdio


CDVCamera.m:23:9: fatal error: 'Cordova/NSData+Base64.h' file not found
#import <Cordova/NSData+Base64.h>
        ^
1 error generated.


Kindly,
Dmitry