Don't build adb for simulator target

Change-Id: Ibe4ef6bb111dc7123e53262553deb8f5e25e9391
Signed-off-by: Benoit Goby <benoit@android.com>
diff --git a/adb/Android.mk b/adb/Android.mk
index a61dcde..fe6fbed 100644
--- a/adb/Android.mk
+++ b/adb/Android.mk
@@ -156,6 +156,7 @@
 
 # adb host tool for device-as-host
 # =========================================================
+ifneq ($(TARGET_SIMULATOR),true)
 include $(CLEAR_VARS)
 
 LOCAL_LDLIBS := -lrt -lncurses -lpthread
@@ -192,3 +193,4 @@
 LOCAL_STATIC_LIBRARIES := libzipfile libunz libcutils
 
 include $(BUILD_EXECUTABLE)
+endif