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.

Test: treehugger
Change-Id: I248a2f0450bbd5da132f67872ec018decba42725
diff --git a/cc/config/global.go b/cc/config/global.go
index 32f163d..a6f79d9 100644
--- a/cc/config/global.go
+++ b/cc/config/global.go
@@ -201,6 +201,7 @@
 	pctx.PrefixedExistentPathsForSourcesVariable("CommonGlobalIncludes", "-I",
 		[]string{
 			"system/core/include",
+			"system/core/liblog/include",
 			"system/media/audio/include",
 			"hardware/libhardware/include",
 			"hardware/libhardware_legacy/include",