samba4: add dependency on BR2_TOOLCHAIN_HAS_SYNC_4

samba4 uses the __sync_fetch_and_add_4() atomic built-in, so it should
depend on BR2_TOOLCHAIN_HAS_SYNC_4 in order to avoid build failures on
architectures not providing this atomic built-in.

Fixes:

  http://autobuild.buildroot.org/results/0d0fd9d2a132a40a840bea5df59c35d8573ebf45/

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

package/kodi/Config.in

@@ -215,6 +215,7 @@ config BR2_PACKAGE_KODI_LIBSMBCLIENT
 	bool "samba"
 	depends on BR2_TOOLCHAIN_USES_GLIBC
 	depends on BR2_TOOLCHAIN_HAS_NATIVE_RPC
+	depends on BR2_TOOLCHAIN_HAS_SYNC_4
 	select BR2_PACKAGE_SAMBA4
 	help
 	  Enable Samba support

package/mpd/Config.in

@@ -200,6 +200,7 @@ config BR2_PACKAGE_MPD_LIBSMBCLIENT
 	depends on BR2_TOOLCHAIN_USES_GLIBC
 	depends on !BR2_STATIC_LIBS
 	depends on BR2_TOOLCHAIN_HAS_NATIVE_RPC
+	depends on BR2_TOOLCHAIN_HAS_SYNC_4
 	select BR2_PACKAGE_SAMBA4
 	help
 	  Enable Samba support.

package/samba4/Config.in

@@ -1,4 +1,5 @@
 comment "samba4 needs a toolchain w/ RPC, wchar, dynamic library, threads"
+	depends on BR2_TOOLCHAIN_HAS_SYNC_4
 	depends on !BR2_USE_WCHAR || !BR2_TOOLCHAIN_HAS_NATIVE_RPC \
 		|| BR2_STATIC_LIBS || !BR2_TOOLCHAIN_HAS_THREADS
 	depends on BR2_USE_MMU
@@ -12,6 +13,7 @@ config BR2_PACKAGE_SAMBA4
 	depends on BR2_TOOLCHAIN_HAS_THREADS # python -> libffi
 	depends on !BR2_STATIC_LIBS # python
 	depends on !BR2_nios2 # binary too large, relocations don't fit
+	depends on BR2_TOOLCHAIN_HAS_SYNC_4
 	select BR2_PACKAGE_E2FSPROGS
 	select BR2_PACKAGE_POPT
 	select BR2_PACKAGE_PYTHON