Set framework -install_name to rpath for EarlGrey and OCHamcrest.

ios/third_party/earl_grey/earl_grey.gyp

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'targets': [
     {
       'target_name': 'EarlGrey',
       'type': 'shared_library',
       'mac_bundle': 1,
@@ skipping 254 matching lines @@
         '../fishhook/fishhook.gyp:fishhook',
         '../ochamcrest/ochamcrest.gyp:OCHamcrest',
       ],
       'xcode_settings': {
         'GCC_SYMBOLS_PRIVATE_EXTERN': 'NO',
         'USE_HEADERMAP': 'YES',
         'CLANG_ENABLE_OBJC_ARC': 'YES',
         'CODE_SIGN_IDENTITY[sdk=iphoneos*]': 'iPhone Developer',
         'BUNDLE_IDENTIFIER': 'com.google.earlgrey.EarlGrey',
         'INFOPLIST_FILE': 'src/EarlGrey-Info.plist',
+        'DYLIB_INSTALL_NAME_BASE': '@rpath',
+        'OTHER_LDFLAGS': [
+          '-Xlinker', '-rpath', '-Xlinker', '@executable_path/Frameworks',
+          '-Xlinker', '-rpath', '-Xlinker', '@loader_path/Frameworks'
+        ]
       },
       'link_settings': {
         'libraries': [
           'CoreGraphics.framework',
           'Foundation.framework',
           'IOKit.framework',
           'QuartzCore.framework',
           'UIKit.framework',
           'XCTest.framework',
         ],
@@ skipping 17 matching lines @@
           # EarlGrey and its dependencies need to link to XCTest.framework
           # which is not under SDKROOT.
           '$(SDKROOT)/../../Library/Frameworks',
           '<(PRODUCT_DIR)'
         ],
       },
     },
   ],
 }