fish: do not use wcstod_l() even if found on target

Fix following error when building fish on device with Android 9:

src/builtin_printf.cpp:278:12: error: use of undeclared identifier 'wcstod_l'; did you mean 'wcstold_l'?
    return wcstod_l(s, end, fish_c_locale());

packages/fish/build.sh

@@ -11,6 +11,7 @@ TERMUX_PKG_DEPENDS="libc++, ncurses, libandroid-support, ncurses-utils, man, bc,
 TERMUX_PKG_BUILD_IN_SRC=true
 TERMUX_PKG_EXTRA_CONFIGURE_ARGS="
 ac_cv_file__proc_self_stat=yes
+ac_cv_func_wcstod_l=no
 --without-included-pcre2
 "