Standardize make lint target in components

In some places the `lint` target is just flake8 and in others it runs
all linters. Adopt the latter definition to ensure that `make lint` runs
all tools that don't run any code.

client/Makefile

@@ -109,12 +109,15 @@ test-functional: ## Run the functional tests
 test-sdk: ## Run just the sdk tests
 	@poetry run pytest -v $(STESTS)
 
-.PHONY: lint
-lint: ## Run the linters
+.PHONY: flake8
+flake8: ## Run flake8 linting
 	@poetry run flake8 securedrop_client tests
 
+.PHONY: lint
+lint: check-black check-isort flake8 mypy semgrep ## Run all linters
+
 .PHONY: check
-check: clean check-black check-isort semgrep lint mypy test-random test-integration test-functional ## Run the full CI test suite
+check: clean lint test-random test-integration test-functional ## Run the full CI test suite
 
 # Explanation of the below shell command should it ever break.
 # 1. Set the field separator to ": ##" and any make targets that might appear between : and ##

export/Makefile

@@ -1,8 +1,12 @@
 .PHONY: all
 all: help
 
+.PHONY: lint
+lint: check-black flake8 mypy semgrep  ## Run all linters
+
+
 .PHONY: check
-check: lint mypy semgrep test check-black ## Run linter and tests
+check: lint test ## Run linter and tests
 
 .PHONY: check-black
 check-black: ## Check Python source code formatting with black
@@ -13,8 +17,8 @@ TESTS ?= tests
 test:  ## Run tests
 	poetry run pytest -v --cov-report html --cov-report term-missing --cov=securedrop_export $$TESTS
 
-.PHONY: lint
-lint:  ## Run linter
+.PHONY: flake8
+flake8:  ## Run flake8 linter
 	poetry run flake8 securedrop_export/ tests/
 
 .PHONY: mypy

log/Makefile

@@ -2,7 +2,10 @@ DEFAULT_GOAL: help
 SHELL := /bin/bash
 
 .PHONY: check
-check: flake8 mypy test
+check: lint test
+
+.PHONY: lint
+lint: flake8 mypy ## Run all linters
 
 .PHONY: flake8
 flake8: ## Run flake8 to lint Python files