aiccu: don't link with librt

Buildroot no longer supports toolchains with glibc older than 2.17, so there
is no need to link with librt for clock_* system calls.

Cc: Michael Rommel <rommel@layer-7.net>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/aiccu/0003-clock-suite-functions-fix.patch

@@ -1,18 +0,0 @@
-aiccu: fix undefined reference to clock_* functions
-
-Since glibc 2.17 the clock_* suite functions are available directly in 
-the main C library. For previous versions we still need -lrt to link.
-
-Signed-off-by: Vicente Olivert Riera <vincent.riera@imgtec.com>
-
---- aiccu/unix-console/Makefile.orig	2014-01-14 10:17:20.204602513 +0000
-+++ aiccu/unix-console/Makefile	2014-01-14 10:17:31.435777359 +0000
-@@ -42,7 +42,7 @@ CFLAGS	+= -D AICCU_CONSOLE
- # Currently defaultly builds only on Linux, but other platforms might easily also support it
- ifeq ($(shell uname | grep -c "Linux"),1)
- CFLAGS	+= -D AICCU_GNUTLS
--LDFLAGS += -lgnutls
-+LDFLAGS += -lgnutls -lrt
- endif
- 
- # Linux