Reland: "Include system/core/liblog/include instead of using symlinks"

It seems better to include this path directly rather than creating
symlinks in system/core that accomplish the same result.

Bug: 165825252
Test: treehugger
Change-Id: Ic78f09d86039540a2b0eead45e985b42c553f415
diff --git a/cc/config/global.go b/cc/config/global.go
index d4c6266..97e423a 100644
--- a/cc/config/global.go
+++ b/cc/config/global.go
@@ -205,6 +205,7 @@
 	pctx.PrefixedExistentPathsForSourcesVariable("CommonGlobalIncludes", "-I",
 		[]string{
 			"system/core/include",
+			"system/core/liblog/include",
 			"system/media/audio/include",
 			"hardware/libhardware/include",
 			"hardware/libhardware_legacy/include",