lang/v8-devel: unbreak with ICU >= 59

In file included from ../src/i18n.cc:8:
In file included from /usr/local/include/unicode/brkiter.h:47:
In file included from /usr/local/include/unicode/unistr.h:33:
/usr/local/include/unicode/char16ptr.h:90:19: error: deleted function definitions are a C++11 extension [-Werror,-Wc++11-extensions]

Char16Ptr() = delete;
              ^

/usr/local/include/unicode/char16ptr.h:198:24: error: deleted function definitions are a C++11 extension [-Werror,-Wc++11-extensions]

ConstChar16Ptr() = delete;
                   ^

../src/runtime.cc:14238:3: error: no member named 'Normalizer' in namespace 'icu'; did you mean 'UNormalizer2'?

icu::Normalizer::normalize(u_value, normalizationForms[form_id], 0,
^~~~~~~~~~~~~~~
UNormalizer2

/usr/local/include/unicode/unorm2.h:119:29: note: 'UNormalizer2' declared here
typedef struct UNormalizer2 UNormalizer2; /**< C typedef for struct UNormalizer2. @stable ICU 4.4 */

^

../src/runtime.cc:14238:8: error: incomplete type 'UNormalizer2' named in nested name specifier

icu::Normalizer::normalize(u_value, normalizationForms[form_id], 0,
~~~~~^~~~~~~~~~~~

/usr/local/include/unicode/unorm2.h:118:8: note: forward declaration of 'UNormalizer2'
struct UNormalizer2;

^

PR: 222269