Rename kCall to kCallOnMainOnly

This patch renames kCall to kCallOnMainOnly in preparation for
the next patch in this series which will be adding kCallOnMainAndSlowPath.

Note: With this patch there will be places where we use kCallOnMainOnly
even though we call on the slow path too. The next patch in this series
will fix that.

Test: ART host tests.
Change-Id: Iabfdb0901990d163be5d780f3bdd2fab6fa17b32
diff --git a/compiler/optimizing/locations.h b/compiler/optimizing/locations.h
index 3f27c91..7a78bfd 100644
--- a/compiler/optimizing/locations.h
+++ b/compiler/optimizing/locations.h
@@ -481,7 +481,7 @@
   enum CallKind {
     kNoCall,
     kCallOnSlowPath,
-    kCall
+    kCallOnMainOnly
   };
 
   LocationSummary(HInstruction* instruction,
@@ -541,7 +541,7 @@
   Location Out() const { return output_; }
 
   bool CanCall() const { return call_kind_ != kNoCall; }
-  bool WillCall() const { return call_kind_ == kCall; }
+  bool WillCall() const { return call_kind_ == kCallOnMainOnly; }
   bool OnlyCallsOnSlowPath() const { return call_kind_ == kCallOnSlowPath; }
   bool NeedsSafepoint() const { return CanCall(); }