build: Use the original install-sh file from SGI

build: Use the original install-sh file from SGI

The install-sh file is much more efficient than the libtool version
(50% faster wall clock time; much more than that when running in a
qemu emulation build environment).  There doesn't seem to be any
real need for the libtool version, so bring back the original
install-sh script.

[Eryu: move install-sh to include dir and copy it from there after
libtoolize in Makefile]

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>