[collectd] [PATCH] use -type f predicate when checking for javac

[Doug MacEachern]

If the java samples are installed, the javac check may cause the build
to fail:

http://hudson.hyperic.com/job/collectd-master-dist/29/console
Making all in java
make[2]: Entering directory
`/home/hudson/hudson.hyperic.com/jobs/collectd-master-dist/workspace/bin
dings/java'
/home/hudson/jdk/sample/javac -d "." "./org/collectd/api"/*.java
/bin/sh: /home/hudson/jdk/sample/javac: is a directory
make[2]: *** [java-build-stamp] Error 126
...

% find -L /home/hudson/jdk -name javac
/home/hudson/jdk/sample/javac
/home/hudson/jdk/bin/javac

Attached patch fixes by simply adding '-type f'
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