chromium: late-bind xdg-utils if broken

xdg-utils does not cross-compile.  Let's late-bind (using the
runtime $PATH) in this scenario so a native-built xdg-utils can be
used instead.

pkgs/applications/networking/browsers/chromium/common.nix

@@ -139,7 +139,10 @@ let
       bzip2 flac speex opusWithCustomModes
       libevent expat libjpeg snappy
       libcap
-      xdg-utils minizip libwebp
+    ] ++ lib.optionals (!xdg-utils.meta.broken) [
+      xdg-utils
+    ] ++ [
+      minizip libwebp
       libusb1 re2
       ffmpeg libxslt libxml2
       nasm
@@ -225,6 +228,7 @@ let
           '/usr/share/locale/' \
           '${glibc}/share/locale/'
 
+    '' + lib.optionalString (!xdg-utils.meta.broken) ''
       sed -i -e 's@"\(#!\)\?.*xdg-@"\1${xdg-utils}/bin/xdg-@' \
         chrome/browser/shell_integration_linux.cc
 

pkgs/applications/networking/browsers/chromium/default.nix

@@ -213,8 +213,10 @@ in stdenv.mkDerivation {
 
     export XDG_DATA_DIRS=$XDG_ICON_DIRS:$GSETTINGS_SCHEMAS_PATH\''${XDG_DATA_DIRS:+:}\$XDG_DATA_DIRS
 
+  '' + lib.optionalString (!xdg-utils.meta.broken) ''
     # Mainly for xdg-open but also other xdg-* tools (this is only a fallback; \$PATH is suffixed so that other implementations can be used):
     export PATH="\$PATH\''${PATH:+:}${xdg-utils}/bin"
+  '' + ''
 
     .
     w