Fix codesigning issues with spaces

This small change fixes an issue with `{target}-frameworks.sh`, wherein spaces in the target cause a `No such file or directory` error. The fix is simple: wrap `code_sign_if_enabled` in quotes. Works in my local env and hope it works in yours too 👍

Fixes and closes CocoaPods/CocoaPods#6153.

CHANGELOG.md

@@ -11,6 +11,9 @@ To install release candidates run `[sudo] gem install cocoapods --pre`
 * None.  
 
 ##### Bug Fixes
+* Fix codesigning issues when targets have spaces.   
+  [Sam Gammon](https://github.com/sgammon)
+  [#6153](https://github.com/CocoaPods/CocoaPods/issues/6153)
 
 * Raise an exception if unable to find a reference for a path and handle symlink references.  
   [Dimitris Koutsogiorgas](https://github.com/dnkoutso)

lib/cocoapods/generator/embed_frameworks_script.rb

@@ -77,7 +77,7 @@ module Pod
             fi
 
             # Resign the code if required by the build settings to avoid unstable apps
-            code_sign_if_enabled "${destination}/$(basename "$1")"
+            code_sign_if_enabled "\"${destination}/$(basename "$1")\""
 
             # Embed linked Swift runtime libraries. No longer necessary as of Xcode 7.
             if [ "${XCODE_VERSION_MAJOR}" -lt 7 ]; then