Fix clang + bfd linker build

To speed up linking 134-based introduced passing -S (no symbol
table/index) for thin archives. The bfd linker cannot handle that and
needs -s, but the check for that was wrong because it did not cover
the case where clang is the compiler but bfd ld is the linker. Fix the
check by passing -s whenever the linker is not mold/gold/lld. This
should only affect linking with bfd ld.

Fixes "/usr/bin/ld: host/obj/third_party/brotli/libcommon.a: error
adding symbols: archive has no index; run ranlib to add one"

Fixes: QTBUG-141153
Change-Id: I2dadcc48a081025e55774d8e5560fc087abd439b
Reviewed-on: https://codereview.qt-project.org/c/qt/qtwebengine-chromium/+/684653
Reviewed-by: Michal Klocek <michal.klocek@qt.io>

Author: moheim-qt

chromium/build/config/compiler/BUILD.gn

@@ -2531,7 +2531,7 @@ config("export_dynamic") {
 # 2. Remove the thin_archive config, so that the .a file actually contains all
 #    .o files, instead of just references to .o files in the build directoy
 config("thin_archive") {
-  if ((is_apple && use_lld) || (is_linux && !is_clang)) {
+  if ((is_apple && use_lld) || (is_linux && (!use_lld && !use_gold && !use_mold))) {
     # The macOS and iOS linker ld64.ldd doesn't support thin archive without
     # symbol table, gcc on linux also throws the error `archive has no index`.
     arflags = [