Add host tool fastboot to every build.

Some tools expect fastboot to be present even in user builds.

Change-Id: I4b6ee458eb2feb0dc7a77ec33a04219c5f4adc0d
diff --git a/target/product/embedded.mk b/target/product/embedded.mk
index 96c0b77..a408860 100644
--- a/target/product/embedded.mk
+++ b/target/product/embedded.mk
@@ -25,6 +25,7 @@
     debuggerd \
     dumpstate \
     dumpsys \
+    fastboot \
     gralloc.default \
     grep \
     gzip \