Fixed an issue with source extensions

This issue was forcing the pod library to only include the header
files, leaving the symbols unfound.
Fixed linking errors when compiled in actual applications
Updated usbmuxd podspec
Revert "Updated usbmuxd podspec"

This reverts commit 5025f6d7764765635c68a0b8101c073f8986d475.

Revert "Fixed linking errors when compiled in actual applications"

This reverts commit ef567e10a33c593be5ade4e0f88c7ee2077a4858.

Revert "Fixed an issue with source extensions"

This reverts commit b3fe04b1c1ff1ca4ae8d45821d05996b076f34e8.
Updated usbmuxd podspec to fix compilation issues
Merge pull request #3549 from Clstroud/master

Updated usbmuxd podspec to fix compilation issues