Fix building ASAN instrumented executables with custom entrypoints

base/win/BUILD.gn

Index: base/win/BUILD.gn
diff --git a/base/win/BUILD.gn b/base/win/BUILD.gn
index ff2a754ae2ff7aeca66cfd2fc293289e8f08b432..74c1b8a0a9c40678c2e447395687f68c49e2c80e 100644
--- a/base/win/BUILD.gn
+++ b/base/win/BUILD.gn
@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 import("//build/buildflag_header.gni")
+import("//build/config/sanitizers/sanitizers.gni")
 import("//build/win/message_compiler.gni")
 
 declare_args() {
@@ -42,7 +43,9 @@ shared_library("eventlog_provider") {
     "eventlog_provider.cc",
   ]
 
-  ldflags = [ "/NOENTRY" ]
+  if (!is_asan) {
+    ldflags = [ "/NOENTRY" ]
+  }
 
   deps = [
     "//base/win:eventlog_messages",