update .clang-format for clang-7

  update to version 7 of clang-format
  added files that are affected with format change.

  BUG=http://b/120815481

Change-Id: I76107f7c921f38f54bbe80ffdf9e08ce0ff2cc69
diff --git a/av1/encoder/mcomp.c b/av1/encoder/mcomp.c
index f077a4e..a2840d0 100644
--- a/av1/encoder/mcomp.c
+++ b/av1/encoder/mcomp.c
@@ -2017,8 +2017,8 @@
   MV *best_mv = &x->best_mv.as_mv;
   unsigned int best_sad = INT_MAX;
   int i, j;
-  uint8_t do_refine_search_grid[SEARCH_GRID_STRIDE_8P * SEARCH_GRID_STRIDE_8P] =
-      { 0 };
+  uint8_t do_refine_search_grid[SEARCH_GRID_STRIDE_8P *
+                                SEARCH_GRID_STRIDE_8P] = { 0 };
   int grid_center = SEARCH_GRID_CENTER_8P;
   int grid_coord = grid_center;