merge revision(s) 0168094d,cdef1709,b7d86e33:

	Use libSystem.dylib instead of libm.dylib and libc.dylib

	  Because macOS 11.0(Big Sur) was removed libc and libm from `/usr/lib`.

	libSystem.dylib is also symlink. Use libSystem.B.dylib

	Workaroud for macOS Big Sur(11.0)