EmulatorPkg/EmulatorPkg.ci.yaml: Add configuration for LicenseCheck

Add configuration IgnoreFiles for package config files.
So users can rely on this to skip license conflict for
some generated files.

Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Andrew Fish <afish@apple.com>
Cc: Ray Ni <ray.ni@intel.com>
Signed-off-by: Shenglei Zhang <shenglei.zhang@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

EmulatorPkg/EmulatorPkg.ci.yaml

@@ -8,6 +8,10 @@
 # SPDX-License-Identifier: BSD-2-Clause-Patent
 ##
 {
+    ## options defined .pytool/Plugin/LicenseCheck
+    "LicenseCheck": {
+        "IgnoreFiles": []
+    },
     ## options defined .pytool/Plugin/CompilerPlugin
     "CompilerPlugin": {
         "DscPath": "" # Don't support this test