cmake nanoflann examples

alicevision/AliceVision src/CMakeLists.txt :330

find_package(nanoflann REQUIRED)

openturns/openturns CMakeLists.txt :389

find_package (nanoflann CONFIG)

StephLin/KCP CMakeLists.txt :27

find_package(nanoflann REQUIRED QUIET)

MRPT/mrpt cmakemodules/script_nanoflann.cmake :9

find_package(nanoflann CONFIG QUIET)