tools: run format-cpp on node-api test c files

Makefile

@@ -1436,6 +1436,13 @@ LINT_CPP_FILES = $(filter-out $(LINT_CPP_EXCLUDE), $(wildcard \
  tools/snapshot/*.h \
  ))
 
+FORMAT_CPP_FILES ?=
+FORMAT_CPP_FILES += $(LINT_CPP_FILES)
+FORMAT_CPP_FILES += $(wildcard \
+ test/js-native-api/*/*.c \
+ test/node-api/*/*.c \
+ )
+
 # Code blocks don't have newline at the end,
 # and the actual filename is generated so it won't match header guards
 ADDON_DOC_LINT_FLAGS=-whitespace/ending_newline,-build/header_guard
@@ -1464,7 +1471,7 @@ ifneq ("","$(wildcard tools/clang-format/node_modules/)")
  --binary=tools/clang-format/node_modules/.bin/clang-format \
  --style=file \
  $(CLANG_FORMAT_START) -- \
- $(LINT_CPP_FILES)
+ $(FORMAT_CPP_FILES)
 else
  $(info Required tooling for C++ code formatting is not installed.)
  $(info To install (requires internet access) run: $$ make format-cpp-build)