Specify database encoding in new ICU test.

Otherwise, the database encoding varies depending on the user's
environment, and so the test might fail depending on whether ICU
likes the encoding.  In particular, the test fails completely
if the prevailing locale is C.

src/test/icu/t/010_database.pl

@@ -16,7 +16,7 @@ $node1->init;
 $node1->start;
 
 $node1->safe_psql('postgres',
-	q{CREATE DATABASE dbicu LOCALE_PROVIDER icu LOCALE 'C' ICU_LOCALE 'en-u-kf-upper' TEMPLATE template0});
+	q{CREATE DATABASE dbicu LOCALE_PROVIDER icu LOCALE 'C' ICU_LOCALE 'en-u-kf-upper' ENCODING 'UTF8' TEMPLATE template0});
 
 $node1->safe_psql('dbicu',
 q{