bricks: gcc-7 doesn't align variables up to a maximum of 16 bytes

* bricks/brick-shmem: here.

bricks/brick-shmem

@@ -54,8 +54,12 @@
 #define BRICK_SHMEM_H
 
 #ifndef BRICKS_CACHELINE
+#if (__GNUC__ >= 7) // Please new Versions of GCC
+#define	BRICKS_CACHELINE 16
+#else
 #define BRICKS_CACHELINE 64
 #endif
+#endif
 
 namespace brick {
 namespace shmem {