bug#8662: check_JAVA does not support silent rules

[Petteri Räty]

relevant file snippets:

configure.ac:
AM_SILENT_RULES([yes])

Makefile.am:
check_JAVA = Hello.java

Now with make check you get output:

CLASSPATH=.:./.:$CLASSPATH javac -d . Hello.java
echo timestamp > classcheck.stamp

As all sources are compiled with one command a silent javac output could
be for example just

  JAVAC

This would match the output for files other types like CC and CXX.