Bug 29673: Allow English sql localization script

Test plan:
You might want to add a simple SQL statement to your English
custom.sql in order to verify the execution.
Run a Koha install (in English).
Check if the data shows your custom sql action.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>

C4/Installer.pm

@@ -370,7 +370,7 @@ sub load_sql_in_order {
                   ;
     my $localization_file = C4::Context->config('intranetdir') .
                             "/installer/data/$self->{dbms}/localization/$langchoice/custom.sql";
-    if ( $langchoice ne 'en' and -f $localization_file ) {
+    if ( -f $localization_file ) {
         push @fnames, $localization_file;
     }
     foreach my $file (@fnames) {

installer/data/mysql/localization/en/custom.sql

@@ -0,0 +1,2 @@
+-- custom.sql, English edition
+-- You may want to add SQL statements here to customize your Koha install