Fix warnings from perl-5.22 about deprecated regex syntax.

Patch from upstream bug report:

=== modified file 'intltool-update.in'

--- a/intltool-update.in 2014-05-14 02:15:53 +0000

+++ b/intltool-update.in 2016-01-19 19:06:54 +0000

@@ -1062,7 +1062,7 @@

}

}

- if ($str =~ /^(.*)\${?([A-Z_]+)}?(.*)$/)

+ if ($str =~ /^(.*)\$\{?([A-Z_]+)}?(.*)$/)

{

my $rest = $3;

my $untouched = $1;

@@ -1190,10 +1190,10 @@

$name =~ s/\(+$//g;

$version =~ s/\(+$//g;

- $varhash{"PACKAGE_NAME"} = $name if (not $name =~ /\${?AC_PACKAGE_NAME}?/);

- $varhash{"PACKAGE"} = $name if (not $name =~ /\${?PACKAGE}?/);

- $varhash{"PACKAGE_VERSION"} = $version if (not $name =~ /\${?AC_PACKAGE_VERSION}?/);

- $varhash{"VERSION"} = $version if (not $name =~ /\${?VERSION}?/);

+ $varhash{"PACKAGE_NAME"} = $name if (not $name =~ /\$\{?AC_PACKAGE_NAME}?/);

+ $varhash{"PACKAGE"} = $name if (not $name =~ /\$\{?PACKAGE}?/);

+ $varhash{"PACKAGE_VERSION"} = $version if (not $name =~ /\$\{?AC_PACKAGE_VERSION}?/);

+ $varhash{"VERSION"} = $version if (not $name =~ /\$\{?VERSION}?/);

}

if ($conf_source =~ /^AC_INIT\(([^,\)]+),([^,\)]+)[,]?([^,\)]+)?/m)

@@ -1219,11 +1219,11 @@

$version =~ s/\(+$//g;

$bugurl =~ s/\(+$//g if (defined $bugurl);

- $varhash{"PACKAGE_NAME"} = $name if (not $name =~ /\${?AC_PACKAGE_NAME}?/);

- $varhash{"PACKAGE"} = $name if (not $name =~ /\${?PACKAGE}?/);

- $varhash{"PACKAGE_VERSION"} = $version if (not $name =~ /\${?AC_PACKAGE_VERSION}?/);

- $varhash{"VERSION"} = $version if (not $name =~ /\${?VERSION}?/);

- $varhash{"PACKAGE_BUGREPORT"} = $bugurl if (defined $bugurl and not $bugurl =~ /\${?\w+}?/);

+ $varhash{"PACKAGE_NAME"} = $name if (not $name =~ /\$\{?AC_PACKAGE_NAME}?/);

+ $varhash{"PACKAGE"} = $name if (not $name =~ /\$\{?PACKAGE}?/);

+ $varhash{"PACKAGE_VERSION"} = $version if (not $name =~ /\$\{?AC_PACKAGE_VERSION}?/);

+ $varhash{"VERSION"} = $version if (not $name =~ /\$\{?VERSION}?/);

+ $varhash{"PACKAGE_BUGREPORT"} = $bugurl if (defined $bugurl and not $bugurl =~ /\$\{?\w+}?/);

}

# \s makes this not work, why?