Disable adb tests for Windows.

The tests will need some massaging before they're ready to go for
Windows, so just disable them to unblock people trying to mm in adb.

Change-Id: I67f2cd3af1a2444dea9cbb61c0553989442ba44b
diff --git a/adb/Android.mk b/adb/Android.mk
index dd1343b..e091ba8 100644
--- a/adb/Android.mk
+++ b/adb/Android.mk
@@ -6,9 +6,9 @@
 LOCAL_PATH:= $(call my-dir)
 
 ifeq ($(HOST_OS),windows)
-  adb_host_clang := false  # libc++ for mingw not ready yet.
+    adb_host_clang := false  # libc++ for mingw not ready yet.
 else
-  adb_host_clang := true
+    adb_host_clang := true
 endif
 
 # libadb
@@ -103,6 +103,7 @@
 LOCAL_SHARED_LIBRARIES := liblog libbase libcutils
 include $(BUILD_NATIVE_TEST)
 
+ifneq ($(HOST_OS),windows)
 include $(CLEAR_VARS)
 LOCAL_CLANG := $(adb_host_clang)
 LOCAL_MODULE := adb_test
@@ -115,14 +116,15 @@
     libcutils \
 
 ifeq ($(HOST_OS),linux)
-  LOCAL_LDLIBS += -lrt -ldl -lpthread
+    LOCAL_LDLIBS += -lrt -ldl -lpthread
 endif
 
 ifeq ($(HOST_OS),darwin)
-  LOCAL_LDLIBS += -framework CoreFoundation -framework IOKit
+    LOCAL_LDLIBS += -framework CoreFoundation -framework IOKit
 endif
 
 include $(BUILD_HOST_NATIVE_TEST)
+endif
 
 # adb device tracker (used by ddms) test tool
 # =========================================================