Get ICU 4.6 to be compiled without RTTI....

third_party/icu/source/test/intltest/numfmtst.cpp

Index: third_party/icu/source/test/intltest/numfmtst.cpp
===================================================================
--- third_party/icu/source/test/intltest/numfmtst.cpp	(revision 74230)
+++ third_party/icu/source/test/intltest/numfmtst.cpp	(working copy)
@@ -1449,7 +1449,7 @@
             }
 
             // Make sure EURO currency formats have exactly 2 fraction digits
-            DecimalFormat* df = dynamic_cast<DecimalFormat*>(nf);
+            DecimalFormat* df = CR_DYNAMIC_CAST<DecimalFormat*>(nf);
             if (df != NULL) {
                 if (u_strcmp(EUR, df->getCurrency()) == 0) {
                     if (min != 2 || max != 2) {
@@ -2865,7 +2865,7 @@
         if (U_FAILURE(status)) {
           errln("FAIL: measure format parsing: '%s' ec: %s", formats[i], u_errorName(status));
         } else if (result.getType() != Formattable::kObject ||
-            (curramt = dynamic_cast<const CurrencyAmount*>(result.getObject())) == NULL ||
+            (curramt = CR_DYNAMIC_CAST<const CurrencyAmount*>(result.getObject())) == NULL ||
             curramt->getNumber().getDouble() != 1234.56 ||
             UnicodeString(curramt->getISOCurrency()).compare(ISO_CURRENCY_USD)
         ) {