FDR: Squash buckets of included literals in FDR confirm

- Change the compile of literal matchers to two passes.
 - Reverse the bucket assignment in FDR, bucket with longer literals has
   smaller bucket id.
 - Squash the buckets of included literals and jump to the the program of
   included literals directly from parent literal program without going
   through FDR confirm for included iterals.

src/hwlm/hwlm_literal.h

@@ -45,6 +45,8 @@ namespace ue2 {
 /** \brief Max length of the hwlmLiteral::msk and hwlmLiteral::cmp vectors. */
 #define HWLM_MASKLEN 8
 
+#define INVALID_LIT_ID ~0U
+
 /** \brief Class representing a literal, fed to \ref hwlmBuild. */
 struct hwlmLiteral {
     std::string s; //!< \brief The literal itself.
@@ -64,6 +66,21 @@ struct hwlmLiteral {
      * can be quashed by the literal matcher. */
     bool noruns;
 
+    /** \brief included literal id. */
+    u32 included_id = INVALID_LIT_ID;
+
+    /** \brief Squash mask for FDR's confirm mask for included literals.
+     *
+     * In FDR confirm, if we have included literal in another bucket,
+     * we can use this mask to squash the bit for the bucket in FDR confirm
+     * mask and then run programs of included literal directly and avoid
+     * confirm work.
+     *
+     * This value is calculated in FDR compile code once bucket assignment is
+     * completed
+     */
+    u8 squash = 0;
+
     /** \brief Set of groups that literal belongs to.
      *
      * Use \ref HWLM_ALL_GROUPS for a literal that could match regardless of