Add no-deprecated-declarations to ios_breakpad client

Follow up on cl/1611283002.
minidump_generator may be buit on by the breakpad_client target, which
needs to allow the deprecated call.

Will be removed after reland of https://codereview.chromium.org/1563223004/

BUG=579522, 569158

Review URL: https://codereview.chromium.org/1638723003

Cr-Commit-Position: refs/heads/master@{#371515}

breakpad/breakpad.gyp

@@ -311,6 +311,7 @@
               'xcode_settings' : {
                 'WARNING_CFLAGS': [
                   # See https://bugs.chromium.org/p/google-breakpad/issues/detail?id=675.
+                  # TODO(crbug.com/569158): remove when fixed.
                   '-Wno-deprecated-declarations',
                 ],
               },
@@ -871,6 +872,13 @@
               'src',
             ],
           },
+          'xcode_settings' : {
+            'WARNING_CFLAGS': [
+              # See https://bugs.chromium.org/p/google-breakpad/issues/detail?id=675.
+              # TODO(crbug.com/569158): remove when fixed.
+              '-Wno-deprecated-declarations',
+            ],
+          },
         }
       ]
     }],