misc/android: add a NL at the of README

There is no NL at the end of README, and that make it strange
when doing "cat misc/android/README".

Change-Id: Ib47953d7b16e8927a4d6be7d5be8de8f2ddbcc39
Reviewed-on: https://go-review.googlesource.com/114010
Reviewed-by: Elias Naur <[email protected]>

Author: benshi001

misc/android/README

@@ -21,4 +21,5 @@ and set GOOS to android. For example, to run the go1 benchmarks
 
 	export PATH=$GOROOT/bin:$PATH
 	cd $GOROOT/test/bench/go1/
-	GOOS=android GOARCH=arm64 go test -bench=. -count=N -timeout=T
+	GOOS=android GOARCH=arm64 go test -bench=. -count=N -timeout=T
+