* doc/install.texi: Moved --disable-libgcj and

	--with-system-zlib documentation to new section for
	Java-specific options.
	Added explicit Cross-Compiler-Specific Options subheading.
	Added section for Java-specific options.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@78166 138bc75d-0d04-0410-961f-82ee72b054a4