Add patch to remove linking to gmock.

Author: teo-tsirpanis

ports/README.md

@@ -36,3 +36,4 @@ After copying the port, add an entry to the table below. You should also contrib
 | `azure-storage-common-cpp` | Patching to disable default features on libxml2 (https://github.com/Azure/azure-sdk-for-cpp/pull/5221). |
 | `libfaketime`              | Port does not yet exist upstream                                                                        |
 | `vcpkg-cmake-config`       | Patching to fix build issues with CMake 3.29.1. (https://github.com/microsoft/vcpkg/pull/38017)         |
+| `google-cloud-cpp`         | Patching to remove dependency on GMock. (https://github.com/microsoft/vcpkg/pull/39802)                 |

ports/google-cloud-cpp/portfile.cmake

@@ -8,6 +8,7 @@ vcpkg_from_github(
     HEAD_REF main
     PATCHES
         support_absl_cxx17.patch
+        remove_gmock.patch
 )
 
 if ("grpc-common" IN_LIST FEATURES)

ports/google-cloud-cpp/remove_gmock.patch

@@ -0,0 +1,14 @@
+diff --git a/google/cloud/google_cloud_cpp_common.cmake b/google/cloud/google_cloud_cpp_common.cmake
+index 1a14c77..4e8058e 100644
+--- a/google/cloud/google_cloud_cpp_common.cmake
++++ b/google/cloud/google_cloud_cpp_common.cmake
+@@ -271,9 +271,6 @@ set(google_cloud_cpp_mocks_hdrs
+     mocks/mock_stream_range.h)
+ export_list_to_bazel("google_cloud_cpp_mocks.bzl" "google_cloud_cpp_mocks_hdrs"
+                      YEAR "2022")
+-target_link_libraries(
+-    google_cloud_cpp_mocks INTERFACE google-cloud-cpp::common GTest::gmock_main
+-                                     GTest::gmock GTest::gtest)
+ set_target_properties(google_cloud_cpp_mocks PROPERTIES EXPORT_NAME
+                                                         google-cloud-cpp::mocks)
+ target_include_directories(