nxstyle: Ignore long line for file path at line 2

This patch fixes the issue reported by PR #12345 where the file
path existent in the second line of each source file on NuttX.

Sometimes the path could be too long and could raise a nxstyle
issue during the CI test.

Signed-off-by: Alan C. Assis <acassis@gmail.com>

tools/nxstyle.c

@@ -3093,7 +3093,16 @@ int main(int argc, char **argv, char **envp)
 
           if (m > g_maxline && !rhcomment)
             {
-              ERROR("Long line found", lineno, m);
+              /* Ignore the line 2 (file path) */
+
+              if (lineno == 2)
+                {
+                  INFO("Skipping checking line 2: path file\n", 2, m);
+                }
+              else
+                {
+                  ERROR("Long line found", lineno, m);
+                }
             }
         }