fix build with ICU 74

https://bugzilla.mozilla.org/show_bug.cgi?id=1862601
https://bugzilla.mozilla.org/show_bug.cgi?id=1864745

last line: fix build with ICU 48
https://hg-edge.mozilla.org/mozilla-central/rev/5b1712d5d0a3
Index: intl/lwbrk/LineBreaker.cpp
--- intl/lwbrk/LineBreaker.cpp.orig
+++ intl/lwbrk/LineBreaker.cpp
@@ -559,7 +559,13 @@ GetClass(uint32_t u)
     /* REGIONAL_INDICATOR = 39,           [RI] */ CLASS_CHARACTER,
     /* E_BASE = 40,                       [EB] */ CLASS_BREAKABLE,
     /* E_MODIFIER = 41,                   [EM] */ CLASS_CHARACTER,
-    /* ZWJ = 42,                          [ZWJ]*/ CLASS_CHARACTER
+    /* ZWJ = 42,                          [ZWJ]*/ CLASS_CHARACTER,
+    /* AKSARA = 43,                       [AK] */ CLASS_CHARACTER,
+    /* AKSARA_PREBASE = 44,               [AP] */ CLASS_CHARACTER,
+    /* AKSARA_START = 45,                 [AS] */ CLASS_CHARACTER,
+    /* VIRAMA_FINAL = 46,                 [VF] */ CLASS_CHARACTER,
+    /* VIRAMA = 47,                       [VI] */ CLASS_CHARACTER,
+    /* UNAMBIGUOUS_HYPHEN = 48            [HH] */ CLASS_BREAKABLE,
   };
 
   static_assert(U_LB_COUNT == mozilla::ArrayLength(sUnicodeLineBreakToClass),
