Fixed some typos, courtesy of codespell

src/libstrongswan/plugins/ntru/ntru_drbg.h

@@ -71,7 +71,7 @@ struct ntru_drbg_t {
 };
 
 /**
- * Create and instantiate a new DRBG objet.
+ * Create and instantiate a new DRBG object.
  *
  * @param strength		security strength in bits
  * @param pers_str		personalization string

src/libstrongswan/plugins/ntru/ntru_poly.h

@@ -49,7 +49,7 @@ struct ntru_poly_t {
 	void (*get_array)(ntru_poly_t *this, uint16_t *array);
 
 	/**
-	 * Multiply polynomial a with ntru_poly_t object b having sparse coeffients
+	 * Multiply polynomial a with ntru_poly_t object b having sparse coefficients
 	 * to form result polynomial c = a * b
 	 *
 	 * @param a			input polynomial a