build: fix test-v8 target

Clean the deps/v8 directory before rebuilding node for the hash seed test. It is necessary to avoid the script added in [1] to use ignored files while generating `node-debug-support.cc`. [1]: #14901 PR-URL: #17269Fixes: nodejs/node-v8#26 Reviewed-By: Richard Lau <[email protected]> Reviewed-By: Gibson Fahnestock <[email protected]> Reviewed-By: Refael Ackermann <[email protected]>

Author: targos

Makefile

@@ -306,6 +306,7 @@ test-v8: v8
  --no-presubmit \
  --shell-dir=$(PWD)/deps/v8/out/$(V8_ARCH).$(BUILDTYPE_LOWER)\
 $(TAP_V8)
+ git clean -fdxq -- deps/v8
  @echo Testing hash seed
  $(MAKE) test-hash-seed