build.xml: build "custom" classes without -Xlint
build.xml: build "custom" classes without -Xlint

And keep using the full -Xlint:all,-serial for our own things.

tkrishp/Hadoop-BAM,tomwhite/Hadoop-BAM,fnothaft/Hadoop-BAM,fnothaft/Hadoop-BAM,cmnbroad/Hadoop-BAM,HadoopGenomics/Hadoop-BAM,fnothaft/Hadoop-BAM,ryan-williams/Hadoop-BAM,HadoopGenomics/Hadoop-BAM,ryan-williams/Hadoop-BAM,cmnbroad/Hadoop-BAM,HadoopGenomics/Hadoop-BAM