title: What is causing this Crashlytics compile warning? (Auto-Linking supplied '...' framework linker option at '...' is not a dylib)
body: <p>Compiling my main target (not a test target like <a href="https://github.com/bpoplauschi/CrashlyticsFramework/issues/18">here</a>) yields this error:</p>
  
  <pre><code>ld: warning: Auto-Linking supplied 
     '~/Documents/my_app/MyApp/Crashlytics.framework/Crashlytics', 
  framework linker option at 
      ~/Documents/my_app/MyApp/Crashlytics.framework/Crashlytics 
  is not a dylib
  </code></pre>
  
  <p>From this build command:</p>
  
  <blockquote>
    <p>Ld /Build/Products/Debug-iphonesimulator/MyApp.app/MyApp normal i386
        cd ~/Documents/my_app/MyApp
        export IPHONEOS_DEPLOYMENT_TARGET=8.0
        export PATH="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
        /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch i386 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator8.2.sdk -L~/Library/Developer/Xcode/DerivedData/MyApp-dbmrsjmskpqxmnegayfzfxgcwvsm/Build/Products/Debug-iphonesimulator -F~/Library/Developer/Xcode/DerivedData/MyApp-dbmrsjmskpqxmnegayfzfxgcwvsm/Build/Products/Debug-iphonesimulator -F~/Documents/my_app/MyApp -filelist ~/Library/Developer/Xcode/DerivedData/MyApp-dbmrsjmskpqxmnegayfzfxgcwvsm/Build/Intermediates/MyApp.build/Debug-iphonesimulator/MyApp.build/Objects-normal/i386/MyApp.LinkFileList -Xlinker -rpath -Xlinker @executable_path/Frameworks -Xlinker -objc_abi_version -Xlinker 2 -ObjC -lPods-CocoaLumberjack -lPods-Mantle -framework CFNetwork -framework Foundation -framework Security -framework SystemConfiguration -fobjc-arc -fobjc-link-runtime -Xlinker -no_implicit_dylibs -mios-simulator-version-min=8.0 -framework CoreGraphics -lPods -framework MapKit -framework Fabric -lPods-MyApp -Xlinker -dependency_info -Xlinker ~/Library/Developer/Xcode/DerivedData/MyApp-dbmrsjmskpqxmnegayfzfxgcwvsm/Build/Intermediates/MyApp.build/Debug-iphonesimulator/MyApp.build/Objects-normal/i386/MyApp_dependency_info.dat -o ~/Library/Developer/Xcode/DerivedData/MyApp-dbmrsjmskpqxmnegayfzfxgcwvsm/Build/Products/Debug-iphonesimulator/MyApp.app/MyApp</p>
  </blockquote>