(install-libobjc): New target.

(install-fixincludes): Ignore dirs that don't exist.

(libgcc2.a, libgcc1.a): Use || to exit if cp fails.
(install-float-h-cross): Use fi, not done.
Write float.h in $(tmpdir), not in `.'.
(tmpdir): New variable.

From-SVN: r2663