Completely disable building oprofile on host.

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

Change-Id: Ied9aefcc42070ae2e6cd7cc64f7323f72e64dd82
diff --git a/libopt++/Android.mk b/libopt++/Android.mk
index 5b25c7d..f502fda 100644
--- a/libopt++/Android.mk
+++ b/libopt++/Android.mk
@@ -16,6 +16,7 @@
 include $(LOCAL_PATH)/../common.mk
 
 # Build libopt++ on host
+ifeq ($(HAVE_LIBBFD),true)
 include $(CLEAR_VARS)
 
 LOCAL_SRC_FILES:= popt_options.cpp
@@ -26,4 +27,4 @@
 LOCAL_MODULE := libopt++
 
 include $(BUILD_HOST_STATIC_LIBRARY)
-
+endif