Fix x86 master build failure.

Replace bogus DCHECKs with logic matching pre-cleanup code.
Register pairs are considered temp, promoted, dirty or live if
either register of the pair meets criteria.

Change-Id: If2df891fdd1e3351d4cbe72aaf2a2ac5b34b2110
diff --git a/compiler/dex/quick/mir_to_lir.h b/compiler/dex/quick/mir_to_lir.h
index 68c3d0f..946adc5 100644
--- a/compiler/dex/quick/mir_to_lir.h
+++ b/compiler/dex/quick/mir_to_lir.h
@@ -482,11 +482,11 @@
     void FreeTemp(int reg);
     void FreeTemp(RegStorage reg);
     RegisterInfo* IsLive(int reg);
-    RegisterInfo* IsLive(RegStorage reg);
+    bool IsLive(RegStorage reg);
     RegisterInfo* IsTemp(int reg);
-    RegisterInfo* IsTemp(RegStorage reg);
+    bool IsTemp(RegStorage reg);
     RegisterInfo* IsPromoted(int reg);
-    RegisterInfo* IsPromoted(RegStorage reg);
+    bool IsPromoted(RegStorage reg);
     bool IsDirty(int reg);
     bool IsDirty(RegStorage reg);
     void LockTemp(int reg);