Merge topic 'fix_policy_diagnostics'

Source/cmAddCustomTargetCommand.cxx

Source/cmAddExecutableCommand.cxx

Source/cmAddLibraryCommand.cxx

Source/cmComputeTargetDepends.cxx

Source/cmIncludeCommand.cxx

Source/cmMakefile.cxx

Source/cmTarget.cxx

Source/cmTargetLinkLibrariesCommand.cxx

...s/RunCMake/CMP0026/CMP0026-CONFIG-LOCATION-NEW-stderr.txt

...s/RunCMake/CMP0026/CMP0026-LOCATION-CONFIG-NEW-stderr.txt

Tests/RunCMake/CMP0026/CMP0026-NEW-stderr.txt

Tests/RunCMake/CMP0037/CMP0037-NEW-colon-stderr.txt

Tests/RunCMake/CMP0037/CMP0037-NEW-reserved-stderr.txt

Tests/RunCMake/CMP0037/CMP0037-NEW-space-stderr.txt

Tests/RunCMake/CMP0039/CMP0039-NEW-stderr.txt

Tests/RunCMake/CMP0040/CMP0040-NEW-missing-target-stderr.txt

...unCMake/CMP0046/CMP0046-NEW-missing-dependency-stderr.txt

Tests/RunCMake/include/CMP0024-NEW-stderr.txt

...s/RunCMake/target_link_libraries/CMP0023-NEW-2-stderr.txt

Tests/RunCMake/target_link_libraries/CMP0023-NEW-stderr.txt