Fix cert-dcl16-c clang-tidy warnings.

Bug: 120614316
Test: make with WITH_TIDY=1 DEFAULT_GLOBAL_TIDY_CHECKS=-*,cert-dcl16-c
Change-Id: I2dc262d3407aafa969e921236dc3fc3ae60eb9d4
diff --git a/tools/localedata/extract_icu_data.py b/tools/localedata/extract_icu_data.py
index 9dceba2..6b4c346 100755
--- a/tools/localedata/extract_icu_data.py
+++ b/tools/localedata/extract_icu_data.py
@@ -155,7 +155,7 @@
     print
     print 'std::unordered_set<uint64_t> REPRESENTATIVE_LOCALES({'
     for locale in sorted(representative_locales):
-        print '    0x%08Xllu, // %s' % (
+        print '    0x%08XLLU, // %s' % (
             pack_to_uint64(locale),
             locale)
     print '});'