install: Install library files during make install

A make install only installed the binary files but not the librichacl.so library.
Make sure the install target on librichacl directory result in library
install.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

librichacl/Makefile

@@ -24,7 +24,7 @@ default: $(LTLIBRARY)
 
 include $(BUILDRULES)
 
-install:
+install: install-lib
 
 install-dev: default
 	$(INSTALL_LTLIB_DEV)