Dedup NDK library lists in make.

Test: treehugger
Bug: None
Change-Id: I532e2f5828727440d71dacd65e5c993382530ab9
diff --git a/cc/makevars.go b/cc/makevars.go
index 4cb414e..968eeb5 100644
--- a/cc/makevars.go
+++ b/cc/makevars.go
@@ -97,12 +97,6 @@
 	ctx.Strict("CLANG_EXTERNAL_CFLAGS", "${config.ClangExternalCflags}")
 	ctx.Strict("GLOBAL_CLANG_CFLAGS_NO_OVERRIDE", "${config.NoOverrideClangGlobalCflags}")
 	ctx.Strict("GLOBAL_CLANG_CPPFLAGS_NO_OVERRIDE", "")
-	ndkLibNames := []string{}
-	for _, lib := range ndkKnownLibs {
-		ndkLibNames = append(ndkLibNames, strings.TrimPrefix(lib, "lib"))
-	}
-	sort.Strings(ndkLibNames)
-	ctx.Strict("NDK_PREBUILT_SHARED_LIBRARIES", strings.Join(ndkLibNames, " "))
 
 	ctx.Strict("BOARD_VNDK_VERSION", ctx.DeviceConfig().VndkVersion())
 
@@ -180,7 +174,7 @@
 	ctx.StrictRaw("SRC_SYSTEM_HEADERS", strings.Join(systemIncludes, " "))
 
 	sort.Strings(ndkKnownLibs)
-	ctx.Strict("NDK_MIGRATED_LIBS", strings.Join(ndkKnownLibs, " "))
+	ctx.Strict("NDK_KNOWN_LIBS", strings.Join(ndkKnownLibs, " "))
 
 	hostTargets := ctx.Config().Targets[android.BuildOs]
 	makeVarsToolchain(ctx, "", hostTargets[0])