Fixed building QuickJS support with clang 19.

Fixed building QuickJS support with clang 19.

checking for QuickJS library -lquickjs In file included from
build/autotest.c:6:
/home/xeioex/workspace/nginx/nginScript/quickjs/quickjs.h:1052:34:
error: cast from 'JSCFunctionMagic *' (aka 'struct JSValue (*)(struct
JSContext *, struct JSValue, int, struct JSValue *, int)') to
'JSCFunction *' (aka 'struct JSValue (*)(struct JSContext *, struct
JSValue, int, struct JSValue *)') converts to incompatible function type
[-Werror,-Wcast-function-type-mismatch] 1052 | return
JS_NewCFunction2(ctx, (JSCFunction *)func, name, length, cproto, magic);

-Wcast-function-type-mismatch become enabled by -Werror since
clang 19.