Add support for \b and ^ and $ in multiline mode, completing Irregexp...

src/bytecodes-irregexp.h

Index: src/bytecodes-irregexp.h
===================================================================
--- src/bytecodes-irregexp.h	(revision 1094)
+++ src/bytecodes-irregexp.h	(working copy)
@@ -72,8 +72,9 @@
 V(CHECK_REGISTER_LT, 37, 8) /* check_reg_lt register_index value16 addr32   */ \
 V(CHECK_REGISTER_GE, 38, 8) /* check_reg_ge register_index value16 addr32   */ \
 V(CHECK_REGISTER_EQ_POS, 39, 6) /* check_register_eq_pos index addr32       */ \
-V(CHECK_NOT_AT_START, 40, 5) /* check_not_at_start addr32                   */ \
-V(CHECK_GREEDY,      41, 5) /* check_greedy addr32                          */
+V(CHECK_AT_START,    40, 5) /* check_at_start addr32                        */ \
+V(CHECK_NOT_AT_START, 41, 5) /* check_not_at_start addr32                   */ \
+V(CHECK_GREEDY,      42, 5) /* check_greedy addr32                          */
 
 #define DECLARE_BYTECODES(name, code, length) \
   static const int BC_##name = code;