[Fix] LibComponentLogging-pods, don't create symlinks for headers

Fixes https://github.com/aharren/LibComponentLogging-CocoaPods-Specs/issues/3

Tests from LibComponentLogging-pods-tests from https://github.com/aharren/LibComponentLogging-CocoaPods-Specs pass:

CocoaPods 0.16:

    CocoaPods: 0.16.4
    TestEmbedded: [init] [pod install] [edit config files] [modify main.m] [build] [pod update] [build] [pod install] [build] 
    TestNonEmbedded: [init] [pod install] [edit config files] [modify main.m] [build] [pod update] [build] [pod install] [build] 

CocoaPods 0.17:

    CocoaPods: 0.17.0.rc6
    TestEmbedded: [init] [pod install] 
    [!] Specification#config is deprecated. The config is accessible from the parameter passed to the hooks
    ...
    [edit config files] [modify main.m] [build] [pod update] [build] [pod install] [build] 
    TestNonEmbedded: [init] [pod install] 
    [!] Specification#config is deprecated. The config is accessible from the parameter passed to the hooks
    ...
    [edit config files] [modify main.m] [build] [pod update] [build] [pod install] [build]