Fix Linux Build

[samdeane]

Tests are failing for the Linux build with my standard Tests.yml setup.

Need to look into this...

[xanderdunn]

I am hitting this issue.

Using Swift for Tensorflow 0.10, which is a Swift 5.3 dev branch:

$ which swift
/home/xander/swift-tensorflow-RELEASE-0.10-cuda10.2-cudnn7-ubuntu18.04/usr/bin/swift
$ swift --version
Swift version 5.3-dev (LLVM 55d27a5828, Swift 6a5d84ec08)
Target: x86_64-unknown-linux-gnu

On Ubuntu 18.04, DictionaryCoding 1.0.9:

.build/checkouts/DictionaryCoding/Sources/DictionaryCoding/DictionaryDecoder.swift:955:27: error
: cannot find 'kCFBooleanTrue' in scope
            if number === kCFBooleanTrue as NSNumber {
                          ^~~~~~~~~~~~~~
.build/checkouts/DictionaryCoding/Sources/DictionaryCoding/DictionaryDecoder.swift:957:34: error
: cannot find 'kCFBooleanFalse' in scope
            } else if number === kCFBooleanFalse as NSNumber {
                                 ^~~~~~~~~~~~~~~
.build/checkouts/DictionaryCoding/Sources/DictionaryCoding/DictionaryDecoder.swift:976:59: error
: cannot find 'kCFBooleanTrue' in scope
        guard let number = value as? NSNumber, number !== kCFBooleanTrue, number !== kCFBooleanFalse else {
                                                          ^~~~~~~~~~~~~~
.build/checkouts/DictionaryCoding/Sources/DictionaryCoding/DictionaryDecoder.swift:976:86: error
: cannot find 'kCFBooleanFalse' in scope
        guard let number = value as? NSNumber, number !== kCFBooleanTrue, number !== kCFBooleanFalse else {
                                                                                     ^~~~~~~~~~~~~~~
.build/checkouts/DictionaryCoding/Sources/DictionaryCoding/DictionaryDecoder.swift:991:59: error
: cannot find 'kCFBooleanTrue' in scope
        guard let number = value as? NSNumber, number !== kCFBooleanTrue, number !== kCFBooleanFalse else {
                                                          ^~~~~~~~~~~~~~
.build/checkouts/DictionaryCoding/Sources/DictionaryCoding/DictionaryDecoder.swift:991:86: error
: cannot find 'kCFBooleanFalse' in scope
        guard let number = value as? NSNumber, number !== kCFBooleanTrue, number !== kCFBooleanFalse else {
                                                                                     ^~~~~~~~~~~~~~~
.build/checkouts/DictionaryCoding/Sources/DictionaryCoding/DictionaryDecoder.swift:1006:59: erro
r: cannot find 'kCFBooleanTrue' in scope
        guard let number = value as? NSNumber, number !== kCFBooleanTrue, number !== kCFBooleanFalse else {
                                                          ^~~~~~~~~~~~~~
.build/checkouts/DictionaryCoding/Sources/DictionaryCoding/DictionaryDecoder.swift:1006:86: erro
r: cannot find 'kCFBooleanFalse' in scope
        guard let number = value as? NSNumber, number !== kCFBooleanTrue, number !== kCFBooleanFalse else {
                                                                                     ^~~~~~~~~~~~~~~
.build/checkouts/DictionaryCoding/Sources/DictionaryCoding/DictionaryDecoder.swift:1021:59: erro
r: cannot find 'kCFBooleanTrue' in scope
        guard let number = value as? NSNumber, number !== kCFBooleanTrue, number !== kCFBooleanFalse else {
                                                          ^~~~~~~~~~~~~~
.build/checkouts/DictionaryCoding/Sources/DictionaryCoding/DictionaryDecoder.swift:1021:86: erro
r: cannot find 'kCFBooleanFalse' in scope
        guard let number = value as? NSNumber, number !== kCFBooleanTrue, number !== kCFBooleanFalse else {
                                                                                     ^~~~~~~~~~~~~~~

I tired older versions back to 1.0.0, same errors.

This appears related.