build: Add no-op commands to targets.

This makes make quieter.  Before:

    make: Nothing to be done for `build'.
    make: Nothing to be done for `install'.

1 files changed, 2 insertions, 0 deletions

diff --git a/build b/build
index 4aba4e7..0581e84 100755
--- a/build
+++ b/build
@@ -1,5 +1,7 @@
 #!/usr/bin/make -f
 
 build:
+	@:
 
 install:
+	@: