fix more xcode upgrade warnings

deps/gyp/pylib/gyp/generator/xcode.py

@@ -31,6 +31,10 @@ _intermediate_var = 'INTERMEDIATE_DIR'
 # targets that share the same BUILT_PRODUCTS_DIR.
 _shared_intermediate_var = 'SHARED_INTERMEDIATE_DIR'
 
+# ONLY_ACTIVE_ARCH means that only the active architecture should be build for
+# Debugging purposes to shorten the build time
+_only_active_arch = 'ONLY_ACTIVE_ARCH'
+
 _library_search_paths_var = 'LIBRARY_SEARCH_PATHS'
 
 generator_default_variables = {
@@ -168,6 +172,8 @@ class XcodeProject(object):
     xccl.SetBuildSetting(_shared_intermediate_var,
                          '$(SYMROOT)/DerivedSources/$(CONFIGURATION)')
 
+    xccl.ConfigurationNamed('Debug').SetBuildSetting(_only_active_arch, 'YES')
+
     # Set user-specified project-wide build settings and config files.  This
     # is intended to be used very sparingly.  Really, almost everything should
     # go into target-specific build settings sections.  The project-wide

mapboxgl.gyp

@@ -210,8 +210,7 @@
       ],
       'xcode_settings': {
         'SDKROOT': 'iphoneos',
-        'SUPPORTED_PLATFORMS': ['iphonesimulator','iphoneos'],
-        'ARCHS': [ "armv7", "armv7s", "arm64", "i386", "x86_64" ],
+        'SUPPORTED_PLATFORMS': 'iphonesimulator iphoneos',
         'TARGETED_DEVICE_FAMILY': '1,2',
         'CODE_SIGN_IDENTITY': 'iPhone Developer',
         'IPHONEOS_DEPLOYMENT_TARGET': '7.0',