Description: partially revert changes in https://chromium.googlesource.com/chromium/src/+/40a8d84 that require a version of llvm-ar that's more recent than what is in bionic
Author: Olivier Tilloy <olivier.tilloy@canonical.com>

--- a/build/toolchain/gcc_toolchain.gni
+++ b/build/toolchain/gcc_toolchain.gni
@@ -318,7 +318,7 @@ template("gcc_toolchain") {
       } else {
         rspfile = "{{output}}.rsp"
         rspfile_content = "{{inputs}}"
-        command = "\"$ar\" {{arflags}} -r -c -s -D {{output}} @\"$rspfile\""
+        command = "\"$ar\" {{arflags}} rcsD {{output}} @\"$rspfile\""
       }
 
       # Remove the output file first so that ar doesn't try to modify the
--- a/build/config/compiler/BUILD.gn
+++ b/build/config/compiler/BUILD.gn
@@ -1689,7 +1689,6 @@ config("thin_archive") {
   # have a "thin archive" mode (it does accept -T, but it means truncating
   # archive names to 16 characters, which is not what we want).
   if ((is_posix && !is_nacl && !is_mac && !is_ios) || is_fuchsia) {
-    arflags = [ "-T" ]
   }
 }