Bug 1899444 - Part 2. Move --disable-icu4x to JS standalone. r=spidermonkey-reviewers,platform-i18n-reviewers,firefox-build-system-reviewers,glandium,anba

After landing bug 1824671, Gecko always requires ICU4X. So I would like to
move `--disable-icu4x` options to JS standalone.

Differential Revision: https://phabricator.services.mozilla.com/D214066

js/moz.configure

@@ -1323,6 +1323,23 @@ set_config("MOZ_ICU_CFLAGS", [], when=in_tree_icu)
 set_config("MOZ_SYSTEM_ICU", True, when=system_icu)
 set_define("MOZ_SYSTEM_ICU", True, when=system_icu)
 
+option(
+    "--disable-icu4x",
+    help="Disable using ICU4X",
+    when=js_standalone,
+)
+
+
+@depends(
+    depends("--enable-icu4x", when=js_standalone)(lambda x: bool(x)), js_standalone
+)
+def enable_icu4x(enable, js_standalone):
+    return not js_standalone or enable
+
+
+set_config("MOZ_ICU4X", True, when=enable_icu4x)
+set_define("MOZ_ICU4X", True, when=enable_icu4x)
+
 option("--without-intl-api", help="Disable ECMAScript Internationalization API")
 
 

moz.configure

@@ -535,14 +535,6 @@ option(
 
 set_config("MOZ_UI_LOCALE", depends("--enable-ui-locale")(lambda x: x))
 
-option(
-    "--disable-icu4x",
-    help="Disable using ICU4X",
-)
-
-set_config("MOZ_ICU4X", True, when="--enable-icu4x")
-set_define("MOZ_ICU4X", True, when="--enable-icu4x")
-
 # clang-plugin location
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