Ensure bazel is treated as command not dir

In a previous change we introduced a top-level
directory called `bazel`. Which lead to the
CI failing with the statement "permission denied".

After quite some debugging, we were able to identify
that the problem is, that this make-statement, would
now try to execute the directory `bazel` - where it has
no permisson - and not the binary within PATH.

With this change, it is ensured, that `bazel` is interpreted
as command.

Author: castler

tests_integration/projects/basic/Makefile

@@ -27,7 +27,7 @@ cppcode.lobster: foo.h foo.cpp
 		--out="cppcode.lobster" --clang-tidy $(CLANG_TIDY)
 
 gtests.lobster: foo.h foo.cpp test.cpp
-	@bazel test foo_test --cxxopt='-std=c++14' --enable_workspace
+	@command bazel test foo_test --cxxopt='-std=c++14' --enable_workspace
 	@lobster-gtest $(LOBSTER_ROOT)/bazel-out/*/testlogs/$(THIS_TEST) \
 		--out="gtests.lobster"
 	sed -i s/$(THIS_TEST_ESCAPED)\\///g gtests.lobster