Update V8 to r7079 as required by WebKit r80534.

Change-Id: I487c152e485d5a40b68997d7c0d2f1fba5da0834
diff --git a/.gitignore b/.gitignore
index 974628d..db57d1b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -20,6 +20,11 @@
 shell
 shell_g
 /obj/
+/test/es5conform/data/
+/test/mozilla/data/
+/test/sputnik/sputniktests/
+/tools/oom_dump/oom_dump
+/tools/oom_dump/oom_dump.o
 /tools/visual_studio/Debug
 /tools/visual_studio/Release
 /xcodebuild/