Clean up include paths

Remove runtime/globals.h and make clients point to the right globals.h
(libartbase/base/globals.h).  Also make within-libartbase includes
relative rather than using base/, etc.

Bug: 22322814
Test: make -j 40 checkbuild
Change-Id: I99de63fc851d48946ab401e2369de944419041c7
diff --git a/libartbase/base/histogram-inl.h b/libartbase/base/histogram-inl.h
index 26d01b2..9832f03 100644
--- a/libartbase/base/histogram-inl.h
+++ b/libartbase/base/histogram-inl.h
@@ -26,9 +26,9 @@
 
 #include <android-base/logging.h>
 
-#include "base/bit_utils.h"
-#include "base/time_utils.h"
-#include "base/utils.h"
+#include "bit_utils.h"
+#include "time_utils.h"
+#include "utils.h"
 
 namespace art {