Remove more of the pathmap.

I've fixed libpagemap to export its headers, the only user of the
libnativehelper entry was in this file anyway, and no one was using
the libhost entry.

Change-Id: Id0d1773e55c0114ccc56cefd783689193a6204f9
diff --git a/core/pathmap.mk b/core/pathmap.mk
index 38306f4..190aed3 100644
--- a/core/pathmap.mk
+++ b/core/pathmap.mk
@@ -39,9 +39,6 @@
     frameworks-native:frameworks/native/include \
     libhardware:hardware/libhardware/include \
     libhardware_legacy:hardware/libhardware_legacy/include \
-    libhost:build/libs/host/include \
-    libnativehelper:libnativehelper/include \
-    libpagemap:system/extras/libpagemap/include \
     libril:hardware/ril/include \
     opengl-tests-includes:frameworks/native/opengl/tests/include \
     recovery:bootable/recovery \
@@ -69,7 +66,7 @@
 # Many modules expect to be able to say "#include <jni.h>",
 # so make it easy for them to find the correct path.
 #
-JNI_H_INCLUDE := $(call include-path-for,libnativehelper)/nativehelper
+JNI_H_INCLUDE := libnativehelper/include/nativehelper
 
 #
 # A list of all source roots under frameworks/base, which will be