Merge: update clang-format requirement and commit

This PR updates the clang-format related changes:
1. the minimal requirement 5.0.1+ -> 5.0.0+
2. update the commit of git-cmake-format

Related PR: #484

README.md

@@ -53,7 +53,7 @@ The Ginkgo CUDA module has the following __additional__ requirements:
 In addition, if you want to contribute code to Ginkgo, you will also need the
 following:
 
-*   _clang-format 5.0.1+_ (ships as part of _clang_)
+*   _clang-format 5.0.0+_ (ships as part of _clang_)
 *   _clang-tidy_ (optional, when setting the flag `-DGINKGO_WITH_CLANG_TIDY=ON`)
 *   _iwyu_ (Include What You Use, optional, when setting the flag `-DGINKGO_WITH_IWYU=ON`)
 

third_party/git-cmake-format/CMakeLists.txt

@@ -1,6 +1,6 @@
 ginkgo_load_git_package(git-cmake-format
     "https://github.com/ginkgo-project/git-cmake-format.git"
-    "46d2b43b24fa3aea366be9cce21abfdfffcf0090"
-    "-DGCF_CLANGFORMAT_MINIMAL_VERSION=5.0.1")
+    "29c23665d624e1cae1308bec651706fdaa8fe38b"
+    "-DGCF_CLANGFORMAT_MINIMAL_VERSION=5.0.0")
 add_subdirectory(${CMAKE_CURRENT_BINARY_DIR}/src
     ${CMAKE_CURRENT_BINARY_DIR}/build EXCLUDE_FROM_ALL)