jack2: Add dependency on atomic intrinsics

Jack requires GCC built-in atomic functions which are architecture specific
and may not be implemented.

This fixes:
http://autobuild.buildroot.net/results/c218be876d3abf7a8e212b6d526595bfd835e1c5/

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/jack2/Config.in

@@ -4,7 +4,7 @@ config BR2_PACKAGE_JACK2
 	depends on BR2_TOOLCHAIN_HAS_THREADS # alsa-lib
 	depends on BR2_USE_MMU # fork()
 	depends on BR2_INSTALL_LIBSTDCPP
-	depends on !BR2_arc # missing compiler intrinsics
+	depends on BR2_TOOLCHAIN_HAS_ATOMIC_INTRINSICS
 	select BR2_PACKAGE_LIBSAMPLERATE
 	select BR2_PACKAGE_LIBSNDFILE
 	select BR2_PACKAGE_ALSA_LIB
@@ -21,8 +21,7 @@ config BR2_PACKAGE_JACK2
 
 	  http://jackaudio.org/
 
-comment "jack2 needs a toolchain w/ largefile, threads, C++"
+comment "jack2 needs a toolchain w/ largefile, threads, C++, atomic intrinsics"
 	depends on BR2_USE_MMU
-	depends on !BR2_arc
 	depends on !BR2_LARGEFILE || !BR2_TOOLCHAIN_HAS_THREADS || \
-		!BR2_INSTALL_LIBSTDCPP
+		!BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_ATOMIC_INTRINSICS