[Analyzer] Inspect the architecture of the user project if needed.

See #1450

CHANGELOG.md

@@ -12,6 +12,11 @@ To install or update CocoaPods see this [guide](http://docs.cocoapods.org/guides
   [Kyle Fuller](https://github.com/kylef)
   [#1456](https://github.com/CocoaPods/CocoaPods/issues/1456)
 
+* If an user target doesn't specify an architecture the value specified for the
+  project is used in CocoaPods targets.  
+  [Fabio Pelosin](https://github.com/irrationalfab)
+  [#1450](https://github.com/CocoaPods/CocoaPods/issues/1450)
+
 * The Pods project now properly configures ARC on all build configurations.  
   [Fabio Pelosin](https://github.com/irrationalfab)
   [#1454](https://github.com/CocoaPods/CocoaPods/issues/1454)

Gemfile.lock

@@ -17,7 +17,7 @@ GIT
 
 GIT
   remote: https://github.com/CocoaPods/Xcodeproj.git
-  revision: 8911fee561255f4f11a29a48e345017aec605081
+  revision: 75a00063e9997e2dd3d617a3966f9c878bb99ba6
   branch: master
   specs:
     xcodeproj (0.12.0)

lib/cocoapods/installer/analyzer.rb

@@ -461,9 +461,7 @@ module Pod
       def compute_archs_for_target_definition(target_definition, user_targets)
         archs = []
         user_targets.each do |target|
-          target.build_configurations.each do |configuration|
-            archs << configuration.build_settings['ARCHS']
-          end
+          archs << target.common_resolved_build_setting('ARCHS')
         end
 
         archs = archs.compact.uniq.sort