RFR (XXS): JDK-8019219 Typo in jdk/makefiles "default" targets

[Tim Bell]

Magnus:

> Bug: https://bugs.openjdk.java.net/browse/JDK-8019219
>
> The default target in CompileNativeLibraries.gmk and 
> CompileLaunchers.gmk is spelled "defalt". This does not affect 
> functionality.
>
> Webrev: 
> http://cr.openjdk.java.net/~ihse/JDK-8019219-correct-target-typo/webrev.01

Looks good to me.

/Tim