Bug#23983 ps.test fails to open shared library.

- Corrected mistake in Windows only test.

mysql-test/r/windows.result

@@ -14,11 +14,9 @@ ERROR HY000: No paths allowed for shared library
 call proc_1();
 ERROR HY000: No paths allowed for shared library
 drop procedure proc_1;
-create procedure proc_1() install plugin my_plug soname '\\root\\some_plugin.dll';
-call proc_1();
-ERROR HY000: No paths allowed for shared library
-call proc_1();
+prepare abc from "install plugin my_plug soname '\\\\root\\\\some_plugin.dll'";
+execute abc;
 ERROR HY000: No paths allowed for shared library
-call proc_1();
+execute abc;
 ERROR HY000: No paths allowed for shared library
-drop procedure proc_1;
+deallocate prepare abc;

mysql-test/t/windows.test

@@ -33,11 +33,9 @@ call proc_1();
 call proc_1();
 drop procedure proc_1;
 
-create procedure proc_1() install plugin my_plug soname '\\root\\some_plugin.dll';
---error ER_UDF_NO_PATHS
-call proc_1();
+prepare abc from "install plugin my_plug soname '\\\\root\\\\some_plugin.dll'";
 --error ER_UDF_NO_PATHS
-call proc_1();
+execute abc;
 --error ER_UDF_NO_PATHS
-call proc_1();
-drop procedure proc_1;
+execute abc;
+deallocate prepare abc;