Do not set --lto-O0 for optimize_for_size targets

--lto-O0 produces smaller binaries compared to --lto-O2 under -O2.
However under -Oz (the default for optimize_for_size), --lto-O2 actually
produces smaller binaries.

                     --lto-O0       --lto-O2
StatsD               2796856        2673728
libLLVM_android.so   15552712       14595544

Test: m
Change-Id: I33151cfd6abc273c4836418a6d8e0b935db02af4

1 files changed, 1 insertions, 1 deletions

diff --git a/cc/lto.go b/cc/lto.go
index f3af7d278..44441527a 100644
--- a/cc/lto.go
+++ b/cc/lto.go
@@ -110,7 +110,7 @@ func (lto *lto) flags(ctx ModuleContext, flags Flags) Flags {
 		var ltoLdFlags []string
 
 		// Do not perform costly LTO optimizations for Eng builds.
-		if Bool(lto.Properties.Lto_O0) || ctx.optimizeForSize() || ctx.Config().Eng() {
+		if Bool(lto.Properties.Lto_O0) || ctx.Config().Eng() {
 			ltoLdFlags = append(ltoLdFlags, "-Wl,--lto-O0")
 		}