Fix the OS regex skip in 03-xsstatic.t

Author: bingos

t/03-xsstatic.t

@@ -14,7 +14,7 @@ use Test::More;
 plan skip_all => "ExtUtils::CBuilder not installed or couldn't find a compiler"
   unless have_compiler();
 plan skip_all => 'Shared perl library' if $Config{useshrplib} eq 'define';
-plan skip_all => $^O if $^O =~ m!^(MSWin32|cygwin|haiku)!;
+plan skip_all => $^O if $^O =~ m!^(MSWin32|cygwin|haiku)$!;
 my @tests = list_static();
 plan skip_all => "No tests" unless @tests;
 plan tests => 6 * @tests;