libbb: rename hash source files. no code changes

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>

libbb/Kbuild.src

@@ -59,9 +59,10 @@ lib-y += login.o
 lib-y += make_directory.o
 lib-y += makedev.o
 lib-y += match_fstype.o
-lib-y += md5.o
+lib-y += hash_md5.o
 # Alternative (disabled) implementation
-#lib-y += md5prime.o
+#lib-y += hash_md5prime.o
+lib-y += hash_sha.o
 lib-y += messages.o
 lib-y += mode_string.o
 lib-y += obscure.o
@@ -90,7 +91,6 @@ lib-y += safe_poll.o
 lib-y += safe_strncpy.o
 lib-y += safe_write.o
 lib-y += setup_environment.o
-lib-y += sha1.o
 lib-y += signals.o
 lib-y += simplify_path.o
 lib-y += single_argv.o