Set the cmake policy for CMP0066 and CMP0067 (dotnet#56811)

src/coreclr/CMakeLists.txt

@@ -1,8 +1,15 @@
 cmake_minimum_required(VERSION 3.6.2)
 
-cmake_policy(SET CMP0042 NEW)
+cmake_policy(SET CMP0042 NEW) # MACOSX_RPATH is enabled by default.
+
+if (CMAKE_VERSION VERSION_GREATER 3.7 OR CMAKE_VERSION VERSION_EQUAL 3.7)
+  cmake_policy(SET CMP0066 NEW) # Honor per-config flags in try_compile() source-file signature.
+endif()
+if (CMAKE_VERSION VERSION_GREATER 3.8 OR CMAKE_VERSION VERSION_EQUAL 3.8)
+  cmake_policy(SET CMP0067 NEW) # Honor language standard in try_compile() source-file signature
+endif()
 if (CMAKE_VERSION VERSION_GREATER 3.15 OR CMAKE_VERSION VERSION_EQUAL 3.15)
-  cmake_policy(SET CMP0091 NEW)
+  cmake_policy(SET CMP0091 NEW) # MSVC runtime library flags are selected by an abstraction.
 endif()
 
 # Set the project name