Explicitly list all .el files in Makefile

This prevents the linter from getting tripped up by an auto-generated
libmpdel-pkg.el file.

Author: pinoaffe

Makefile

@@ -2,8 +2,8 @@ ELPA_DEPENDENCIES=package-lint let-alist
 
 ELPA_ARCHIVES=melpa-stable gnu
 
-TEST_ERT_FILES		= $(wildcard test/*.el)
-LINT_CHECKDOC_FILES	= $(wildcard *.el) ${TEST_ERT_FILES}
+TEST_ERT_FILES		= test/libmpdel-directory-test.el test/libmpdel-test.el
+LINT_CHECKDOC_FILES	= libmpdel-directory.el  libmpdel.el ${TEST_ERT_FILES}
 LINT_PACKAGE_LINT_FILES	= ${LINT_CHECKDOC_FILES}
 LINT_COMPILE_FILES	= ${LINT_CHECKDOC_FILES}