[gn] Switch basic linux32 bots to gn

BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/android/config.gni")
 import("//build/config/arm.gni")
 import("//build/config/dcheck_always_on.gni")
 import("//build/config/mips.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 
@@ skipping 13 matching lines @@
 
   # Enable compiler warnings when using V8_DEPRECATED apis.
   v8_deprecation_warnings = false
 
   # Enable compiler warnings when using V8_DEPRECATE_SOON apis.
   v8_imminent_deprecation_warnings = false
 
   # Embeds the given script into the snapshot.
   v8_embed_script = ""
 
+  # Support for backtrace_symbols on linux.
+  v8_enable_backtrace = false
+
   # Sets -dENABLE_DISASSEMBLER.
   v8_enable_disassembler = false
 
   # Sets -dENABLE_GDB_JIT_INTERFACE.
   v8_enable_gdbjit = false
 
   # Sets -dENABLE_HANDLE_ZAPPING.
   v8_enable_handle_zapping = true
 
   # Enable ECMAScript Internationalization API. Enabling this feature will
@@ skipping 241 matching lines @@
       # applies only to executables and shared libraries produced by V8 since
       # ldflags are not pushed to dependants.
       ldflags += [ "/STACK:2097152" ]
     }
   }
 
   # TODO(jochen): Support v8_enable_prof on Windows.
   # TODO(jochen): Add support for compiling with simulators.
 
   if (is_debug) {
+    if (is_linux && v8_enable_backtrace) {
+      ldflags += [ "-rdynamic" ]
+    }
+
     # TODO(jochen): Add support for different debug optimization levels.
     defines += [
       "ENABLE_DISASSEMBLER",
       "V8_ENABLE_CHECKS",
       "OBJECT_PRINT",
       "VERIFY_HEAP",
       "DEBUG",
       "TRACE_MAPS",
     ]
     if (v8_enable_slow_dchecks) {
@@ skipping 2077 matching lines @@
 
   deps = [
     ":fuzzer_support",
   ]
 
   configs = [ ":internal_config" ]
 }
 
 v8_fuzzer("wasm_asmjs_fuzzer") {
 }