fdr: move long literal handling into Rose

Move the hash table used for long literal support in streaming mode from
FDR to Rose, and introduce new instructions CHECK_LONG_LIT and
CHECK_LONG_LIT_NOCASE for doing literal confirm for long literals.

This simplifies FDR confirm, and guarantees that HWLM matchers will only
be used for literals < 256 bytes long.

src/rose/rose_build_impl.h

@@ -56,6 +56,8 @@ namespace ue2 {
 
 #define ROSE_GROUPS_MAX 64
 
+#define ROSE_LONG_LITERAL_THRESHOLD_MIN 33
+
 struct BoundaryReports;
 struct CastleProto;
 struct CompileContext;
@@ -603,6 +605,9 @@ private:
     ReportID next_nfa_report;
 };
 
+size_t calcLongLitThreshold(const RoseBuildImpl &build,
+                            const size_t historyRequired);
+
 // Free functions, in rose_build_misc.cpp
 
 bool hasAnchHistorySucc(const RoseGraph &g, RoseVertex v);