Makefile.am: Make target library a convenience library.

Makefile.am: Make target library a convenience library.

zlib:
	* Makefile.am: Make target library a convenience library.
	* Makefile.in: Rebuilt.

libffi:
	* Makefile.am: libfficonvenience -> libffi_convenience.
	* Makefile.in: Rebuilt.

boehm-gc:
	* Makefile.am: Make a convenience library.
	* Makefile.in: Rebuilt.

libjava:
	Build a single libgcj.so, without separate gc and zlib libraries.
	* configure.in: Use convenience libraries for boehm-gc and zlib. Set
	SYS_ZLIBS if system zlib is used.
	* configure: Rebuilt.
	* Makefile.am: Use boehm-gc and zlib convenience libraries.
	* Makefile.in: Rebuilt.
	* libtool-version: Increment .so version number.

From-SVN: r50900