cmake HAVE_BCRYPT_PBKDF2 examples

mongodb/mongo-c-driver src/libmongoc/CMakeLists.txt :532 

check_symbol_exists (BCryptDeriveKeyPBKDF2 "windows.h;bcrypt.h" HAVE_BCRYPT_PBKDF2)

cvet/fonline ThirdParty/mongo-c-driver/src/libmongoc/CMakeLists.txt :532 

check_symbol_exists (BCryptDeriveKeyPBKDF2 "windows.h;bcrypt.h" HAVE_BCRYPT_PBKDF2)