ignore/types: add spec file type

This is for RPM package SPEC files.

Fixes #946, Closes #1449

ignore/src/types.rs

@@ -280,6 +280,7 @@ const DEFAULT_TYPES: &'static [(&'static str, &'static [&'static str])] = &[
     ("sml", &["*.sml", "*.sig"]),
     ("soy", &["*.soy"]),
     ("spark", &["*.spark"]),
+    ("spec", &["*.spec"]),
     ("sql", &["*.sql", "*.psql"]),
     ("stylus", &["*.styl"]),
     ("sv", &["*.v", "*.vg", "*.sv", "*.svh", "*.h"]),