Pin the number of jobs in some Make targets

If someone runs `make -j16 test_unit test_analyzer test_web_sqlite`,
then the command would spuriously would fail due to a filesystem racecondition.

The `cp ldlogger build/bin` would basically try to copy a not-yet-existing file,
causing a failure immediately, or later in the test pipeline, when it
excercises the logger. Causing an error similar to this:
```
make[1]: Leaving directory `codechecker/analyzer'
make: *** [test_analyzer] Error 2
make: *** Waiting for unfinished jobs....
```

Let's work around the issue by explicitly restricting the number of jobs
in those calls.

Makefile

@@ -111,8 +111,8 @@ venv_osx:
 clean_venv:
 	rm -rf venv
 
-PIP_DEV_DEPS_CMD = $(MAKE) -C $(CC_ANALYZER) pip_dev_deps && \
-  $(MAKE) -C $(CC_WEB) pip_dev_deps && \
+PIP_DEV_DEPS_CMD = $(MAKE) -C $(CC_ANALYZER) -j1 pip_dev_deps && \
+  $(MAKE) -C $(CC_WEB) -j1 pip_dev_deps && \
   cd $(CC_COMMON) && pip3 install -r requirements_py/dev/requirements.txt
 
 pip_dev_deps:

analyzer/tests/Makefile

@@ -66,7 +66,7 @@ test_functional_in_env: venv_dev
 		$(ACTIVATE_DEV_VENV) && $(FUNCTIONAL_TEST_CMD)
 
 test_build_logger:
-	$(MAKE) -C tools/build-logger test
+	$(MAKE) -C tools/build-logger -j1 test
 
 test_tu_collector:
 	REPO_ROOT=$(REPO_ROOT) $(MAKE) -C $(ROOT)/tools/tu_collector test