Fix broken server Windows SDK build.

I removed these lines because for some reason building under Windows
fails for me when they are present. However the build server breaks
so I'll rolling them back and I'll try to understand that later.
diff --git a/core/main.mk b/core/main.mk
index 8bd9c0d..8783461 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -362,6 +362,9 @@
 	external/qemu \
 	external/sqlite/dist \
 	external/zlib \
+	frameworks/base/libs/utils \
+	frameworks/base/tools/aapt \
+	frameworks/base/tools/aidl \
 	system/core/adb \
 	system/core/fastboot \
 	system/core/libcutils \
@@ -387,6 +390,7 @@
 	development/tools/sdkmanager \
 	development/tools/mkstubs \
 	frameworks/base \
+	frameworks/base/tools/layoutlib \
 	external/googleclient \
 	packages
 else