Completely disable building oprofile on host.

Was trying to build some components even when HAVE_LIBBFD was false.

Change-Id: Ied9aefcc42070ae2e6cd7cc64f7323f72e64dd82
diff --git a/libpopt/Android.mk b/libpopt/Android.mk
index 8f2800d..23aaef9 100644
--- a/libpopt/Android.mk
+++ b/libpopt/Android.mk
@@ -34,6 +34,7 @@
 include $(BUILD_STATIC_LIBRARY)
 
 # Build libpopt on host
+ifeq ($(HAVE_LIBBFD),true)
 include $(CLEAR_VARS)
 
 LOCAL_SRC_FILES:= $(common_src)
@@ -44,4 +45,4 @@
 LOCAL_MODULE := libpopt
 
 include $(BUILD_HOST_STATIC_LIBRARY)
-
+endif