build: add missing files to the distribution.

Makefile.am

@@ -2,7 +2,8 @@
 SUBDIRS = src test deushax monsterz tools gfx
 DIST_SUBDIRS = $(SUBDIRS)
 
-EXTRA_DIST = bootstrap build-linux build-mingw build-mingw64 build-ps3 build/lol-build
+EXTRA_DIST = bootstrap build-linux build-mingw build-mingw64 build-ps3 \
+             build-nacl32 build-nacl64 build/lol-build
 AUTOMAKE_OPTIONS = dist-bzip2
 
 bench:

src/Makefile.am

@@ -23,6 +23,7 @@ liblol_a_SOURCES = \
     $(sdl_sources) \
     \
     shader/shader.cpp shader/shader.h \
+    thread/threadbase.h thread/thread.h \
     gpu/vbo.cpp gpu/vbo.h \
     \
     image/image.cpp image/image.h image/image-private.h \