Only package gcno files for gcov coverage builds.

Bug: 154550223
Test: m -j NATIVE_COVERAGE=true droid dist tests
Test: m -j CLANG_COVERAGE=true droid dist tests
Merged-In: I81598bcab8db105de6692156c001fc961409ce63
Change-Id: I81598bcab8db105de6692156c001fc961409ce63
diff --git a/cc/cc.go b/cc/cc.go
index 0201404..731f288 100644
--- a/cc/cc.go
+++ b/cc/cc.go
@@ -182,11 +182,11 @@
 	// These must be after any module include flags, which will be in CommonFlags.
 	SystemIncludeFlags []string
 
-	Toolchain config.Toolchain
-	Tidy      bool
-	Coverage  bool
-	SAbiDump  bool
-	EmitXrefs bool // If true, generate Ninja rules to generate emitXrefs input files for Kythe
+	Toolchain    config.Toolchain
+	Tidy         bool
+	GcovCoverage bool
+	SAbiDump     bool
+	EmitXrefs    bool // If true, generate Ninja rules to generate emitXrefs input files for Kythe
 
 	RequiredInstructionSet string
 	DynamicLinker          string