Make /fastlink builds as optimized as non-/fastlink builds

build/config/compiler/BUILD.gn

Index: build/config/compiler/BUILD.gn
diff --git a/build/config/compiler/BUILD.gn b/build/config/compiler/BUILD.gn
index 4197228e9cc0245df2f030c1f106504140455001..20c17642ed44c5a6559994ff3d404087ff6dbe79 100644
--- a/build/config/compiler/BUILD.gn
+++ b/build/config/compiler/BUILD.gn
@@ -1569,14 +1569,7 @@ config("minimal_symbols") {
   if (is_win) {
     # Linker symbols for backtraces only.
     cflags = []
-    if (is_win_fastlink) {
-      # Tell VS 2015+ to create a PDB that references debug
-      # information in .obj and .lib files instead of copying
-      # it all. This flag is incompatible with /PROFILE
-      ldflags = [ "/DEBUG:FASTLINK" ]
-    } else {
-      ldflags = [ "/DEBUG" ]
-    }
+    ldflags = [ "/DEBUG" ]
   } else {
     if (is_android) {
       # Breakpad can't handle DWARF 4 symbols properly yet, so use DWARF 3