Fix the ltp Makefile to allow for installation of all non-c (scripts) files
Current the Makefile only builds the .c files and installs
them in the $INSTALL path. However, the ltp directory contains a shell script,
which doen't get copied over (installed) when a "make install"is invoked.
This behaviour causes test 080 to fail since it requires rwtest.sh to be
present in the ltp/ directory.
Tested: Updated the Makefile and ran a static build script & test
080.
Signed-off-by: Akshay Lal <akshaylal@google.com> Signed-off-by: Christoph Hellwig <hch@lst.de>