[feat] Add fromPath to matcher template

src/gcc_matcher.jsontemplate

@@ -4,12 +4,13 @@
             "owner": "gcc-problem-matcher",
             "pattern": [
                 {
-                    "regexp": "^.*?${{ BASE }}\/?(.*?):(\\d+):(\\d*):?\\s+(?:fatal\\s+)?(warning|error):\\s+(.*)$",
-                    "file": 1,
-                    "line": 2,
-                    "column": 3,
-                    "severity": 4,
-                    "message": 5
+                    "regexp": "^(${{ BASE }})(.*?):(\\d+):(\\d*):?\\s+(?:fatal\\s+)?(warning|error):\\s+(.*)$",
+                    "fromPath": 1,
+                    "file": 2,
+                    "line": 3,
+                    "column": 4,
+                    "severity": 5,
+                    "message": 6
                 }
             ]
         }

src/index.js

@@ -21,7 +21,7 @@ const matcherPath = path.join(__dirname, "gcc_matcher.json");
 // rootdir :: string
 const rootdir = core.getInput('build-directory', {required: false});
 
-// parse :: IO() => IO() => Error | null
+// parse :: string => string => Error | null
 const parse = (templatePath) => (matcherPath) => {
 	const content = fs.readFileSync(templatePath, 'utf-8');