EmulatorPkg/Win/Host: Update CC_FLAGS

EmulatorPkg/Win/Host: Update CC_FLAGS

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3747

* Remove deprecated option /Gm that generates a warning.
* Remove /Zi and use '=' instead of '== to let DEBUG/RELEASE/NOOPT
  profile from tools_def.txt enable debug information
* Remove /Gs8192 option that is overriding the larger setting of
  /GS32768 from tools_def.txt that generates a warning.

Cc: Andrew Fish <afish@apple.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Michael Kubacki <michael.kubacki@microsoft.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Michael Kubacki <michael.kubacki@microsoft.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
Reviewed-by: Ray Ni <ray.ni@Intel.com>