gcc: gcc arc supports graphite

The ARC version of gcc does support graphite. It was probably just
forgotten when the BR2_GCC_VERSION_ARC symbol was introduced.

While we're at it, also remove a redundant newline.

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Cc: ARC Maintainers <arc-buildroot@synopsys.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/gcc/Config.in.host

@@ -38,9 +38,9 @@ choice
 		bool "gcc arc (6.x)"
 		# Only supported architecture
 		depends on BR2_arc
+		select BR2_GCC_SUPPORTS_GRAPHITE
 		select BR2_TOOLCHAIN_GCC_AT_LEAST_6
 
-
 	config BR2_GCC_VERSION_4_9_X
 		bool "gcc 4.9.x"
 		# Broken or unsupported architectures