devel/qt5-webengine: fix build with clang 16

This just suppresses one warning which might otherwise
error out with the latest clang.

PR:		270458

www/qt5-webengine/files/patch-src_3rdparty_chromium_build_config_compiler_BUILD.gn

@@ -18,7 +18,15 @@
        ldflags += [ "-Wl,--fatal-warnings" ]
      }
      if (fatal_linker_warnings && is_apple &&
-@@ -407,7 +407,7 @@ config("compiler") {
+@@ -310,6 +310,7 @@ config("compiler") {
+ 
+   if (use_qt && is_clang) {
+     cflags += [
++      "-Wno-enum-constexpr-conversion",
+       "-Wno-unknown-attributes",
+       "-Wno-unknown-pragmas",
+       "-Wno-unknown-warning-option"
+@@ -407,7 +408,7 @@ config("compiler") {
  
      # Compiler instrumentation can introduce dependencies in DSOs to symbols in
      # the executable they are loaded into, so they are unresolved at link-time.
@@ -27,7 +35,7 @@
        ldflags += [
          "-Wl,-z,defs",
          "-Wl,--as-needed",
-@@ -795,7 +795,7 @@ config("compiler_cpu_abi") {
+@@ -795,7 +796,7 @@ config("compiler_cpu_abi") {
          cflags += [ "-mtune=$arm_tune" ]
        }
      } else if (current_cpu == "arm64") {
@@ -36,7 +44,7 @@
          cflags += [ "--target=aarch64-linux-gnu" ]
          ldflags += [ "--target=aarch64-linux-gnu" ]
        }
-@@ -1148,7 +1148,7 @@ config("compiler_deterministic") {
+@@ -1148,7 +1149,7 @@ config("compiler_deterministic") {
        "-Xclang",
        ".",
      ]
@@ -45,7 +53,7 @@
        # We don't use clang -cc1as on Windows (yet? https://crbug.com/762167)
        asmflags = [ "-Wa,-fdebug-compilation-dir,." ]
      }
-@@ -1550,7 +1550,7 @@ config("default_warnings") {
+@@ -1550,7 +1551,7 @@ config("default_warnings") {
          cflags += [ "-Wno-nonportable-include-path" ]
        }
  
@@ -54,7 +62,7 @@
          # Flags NaCl (Clang 3.7) and Xcode 9.2 (Clang clang-900.0.39.2) do not
          # recognize.
          cflags += [
-@@ -1724,7 +1724,7 @@ config("no_chromium_code") {
+@@ -1724,7 +1725,7 @@ config("no_chromium_code") {
        # suppressing them individually, we just blanket suppress them here.
        "-Wno-unused-variable",
      ]
@@ -63,7 +71,7 @@
        cflags += [
          # TODO(https://crbug.com/1031169): Clean up and enable.
          "-Wno-misleading-indentation",
-@@ -1802,7 +1802,7 @@ config("thin_archive") {
+@@ -1802,7 +1803,7 @@ config("thin_archive") {
    # Mac and iOS use the mac-specific "libtool" command, not ar, which doesn't
    # have a "thin archive" mode (it does accept -T, but it means truncating
    # archive names to 16 characters, which is not what we want).
@@ -72,7 +80,7 @@
      arflags = [ "-T" ]
    } else if (is_win && use_lld) {
      arflags = [ "/llvmlibthin" ]
-@@ -2343,7 +2343,7 @@ config("symbols") {
+@@ -2343,7 +2344,7 @@ config("symbols") {
      # flag, so we can use use -g1 for pnacl and nacl-clang compiles.
      # gcc nacl is is_nacl && !is_clang, pnacl and nacl-clang are && is_clang.
      if (!is_nacl || is_clang) {
@@ -81,7 +89,7 @@
      }
  
      # TODO(https://crbug.com/1050118): Investigate missing debug info on mac.
-@@ -2385,7 +2385,7 @@ config("symbols") {
+@@ -2385,7 +2386,7 @@ config("symbols") {
      # DWARF info may be corrupt; offsets in a range list entry are in different
      # sections" there.  Maybe just a bug in nacl_switch_32.S.
      if (!is_apple && !is_nacl && current_cpu != "x86" &&