fix typo, arm is little endian

target/arm/sys-available/toolchain-arm

@@ -6,5 +6,5 @@ config ADK_TARGET_SYSTEM_TOOLCHAIN_ARM
 	select ADK_EABI
 	select ADK_TARGET_NO_FPU
 	help
-	  arm big endian toolchain.
+	  arm little endian toolchain.