don't build programs/tests for sndfile

This fix iOS compilation as they link to non-ios
framework (CoreAudioHardware).
Also there seems to be no reason to build that on other system either
as we don't use them.

Tuleap: #313
Change-Id: Ieaa18e6cd9f881d4d79e288002db75696b7e1426

contrib/src/sndfile/disable_programs.patch

+--- a/Makefile.am	2016-05-30 11:59:21.000000000 -0400
++++ b/Makefile.am	2016-05-30 11:59:28.000000000 -0400
+@@ -6,8 +6,8 @@
+ octave_dir = Octave
+ endif
+
+-SUBDIRS = M4 man doc Win32 src $(octave_dir) examples regtest tests programs
+-DIST_SUBDIRS = M4 man doc Win32 src Octave examples regtest tests programs
++SUBDIRS = M4 man doc Win32 src $(octave_dir)
++DIST_SUBDIRS = M4 man doc Win32 src Octave
+
+ EXTRA_DIST = libsndfile.spec.in sndfile.pc.in

contrib/src/sndfile/rules.mak

@@ -19,6 +19,7 @@ sndfile: libsndfile-$(SNDFILE_VERSION).tar.gz .sum-sndfile
 	$(APPLY) $(SRC)/sndfile/soundcard.patch
 	$(APPLY) $(SRC)/sndfile/carbon.patch
 	$(APPLY) $(SRC)/sndfile/autotools.patch
+	$(APPLY) $(SRC)/sndfile/disable_programs.patch
 	$(UPDATE_AUTOCONFIG) && cd $(UNPACK_DIR) && mv config.guess config.sub Cfg && autoreconf -fi
 	$(MOVE)