copyright/license: Improve checking for copyright header

Besides looking for files with proper extension, check also listed
files without extension, which should contain this header as well.

Signed-off-by: Rafal Stefanowski <rafal.stefanowski@intel.com>

.github/workflows/pullrequest.yml

@@ -5,7 +5,8 @@ on:
       - master
 
 env:
-  EXTENSIONS: "c h cpp py go sh"
+  EXTENSIONS: "c h cpp py go sh mk spec service"
+  FILES: "*Makefile"
 jobs:
   verify-date:
     runs-on: ubuntu-latest
@@ -23,15 +24,16 @@ jobs:
           files_to_check=(${{ steps.changed-files.outputs.added_files }})
           files_to_check+=(${{ steps.changed-files.outputs.modified_files }})
 
-          for FILE in ${files_to_check[@]}; do
-            REGEX=".*\.(.*)"
-            if [[  "$FILE" =~ $REGEX ]]
-            then
-                EXTENSION=${BASH_REMATCH[1]}
-                EXTENSIONS_LIST=($EXTENSIONS)
-                if [[ " ${EXTENSIONS_LIST[*]} " =~ " ${EXTENSION} " ]]
-                then
-                    .github/verify_header.sh $FILE
-                fi
+          for file in ${files_to_check[@]}; do
+            for file_in_list in $FILES; do
+              if [[ "$file" == $file_in_list ]]; then
+                .github/verify_header.sh "$file"
+                continue 2
+              fi
+            done
+
+            extension=${file##*.}
+            if [[ "$EXTENSIONS" =~ $extension ]]; then
+              .github/verify_header.sh "$file"
             fi
           done