Call cmake_minimum_required(VERSION 3.16) first

CMake version >= 3.16 comes from Google's Foundational C++ Support
matrix:
https://github.com/google/oss-policies-info/blob/main/foundational-cxx-support-matrix.md

Call cmake_minimum_required() first, followed by project().

These changes fix two warnings from cmake version 3.31.5 and 4.0.1.

Change-Id: I42d51f2764d95e23a45a709986011dc0aafb3cf8
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/6451084
Reviewed-by: Frank Barchard <[email protected]>
Reviewed-by: James Zern <[email protected]>
Commit-Queue: Frank Barchard <[email protected]>

Author: wantehchang

CMakeLists.txt

@@ -2,12 +2,12 @@
 # Originally created for "roxlu build system" to compile libyuv on windows
 # Run with -DUNIT_TEST=ON to build unit tests
 
-include(CheckCSourceCompiles)
-
+cmake_minimum_required( VERSION 3.16 )
 project ( YUV C CXX )	# "C" is required even for C++ projects
-cmake_minimum_required( VERSION 3.5 )
 option( UNIT_TEST "Built unit tests" OFF )
 
+include(CheckCSourceCompiles)
+
 set ( ly_base_dir	${PROJECT_SOURCE_DIR} )
 set ( ly_src_dir	${ly_base_dir}/source )
 set ( ly_inc_dir	${ly_base_dir}/include )