Fix warnings in Findglog.cmake

[4c3y]

Fix CMake warnings when using recent versions of cmake on ubuntu 20.04 caused by calling find_package_handle_standard_args() in Findglog.cmake for glog and PkgConfig

CMake Warning (dev) at /opt/clion-2023.1.4/bin/cmake/linux/x64/share/cmake-3.27/Modules/FindPackageHandleStandardArgs.cmake:438 (message):
  The package name passed to `find_package_handle_standard_args` (PkgConfig)
  does not match the name of the calling package (glog).  This can lead to
  problems in calling code that expects `find_package` result variables
  (e.g., `_FOUND`) to follow a certain pattern.

[mikeallenspach]

LGTM