* gnu/gcj/runtime/SharedLibLoader.java:  New class.
	* gnu/gcj/runtime/natSharedLibLoader.cc:  Native methods.
	* Makefile.am:  Update accordingly.
	* configure.in:  Add AC_CHECK_LIB for dlopen.
	* include/config.h.in:  Add HAVE_DLOPEN.

From-SVN: r45885