build: include check-source.sh in the "make test" targets.

Makefile.am

@@ -1,7 +1,7 @@
 
 # Put "people" at the end because they're more likely to break builds.
-SUBDIRS = src tutorial test tools games people
-DIST_SUBDIRS = $(SUBDIRS) build binaries
+SUBDIRS = build src tutorial test tools games people
+DIST_SUBDIRS = $(SUBDIRS) binaries
 
 EXTRA_DIST = bootstrap TODO
 AUTOMAKE_OPTIONS = dist-bzip2

build/Makefile.am

@@ -4,7 +4,5 @@ EXTRA_DIST = lol-build \
              build-linux build-mingw build-mingw64 build-ps3 \
              build-nacl32 build-nacl64
 
-EXTRA_DIST = data/gradient.png
-
 TESTS = check-source.sh