Makefile.am: add compat.h, to correct 'make distcheck' failures

Makefile.am

@@ -5,7 +5,7 @@ bin_PROGRAMS	= minerd
 
 EXTRA_DIST	= sha256_generic.c
 
-minerd_SOURCES	= util.c cpu-miner.c miner.h
+minerd_SOURCES	= util.c cpu-miner.c miner.h compat.h
 minerd_LDFLAGS	= -pthread
 minerd_LDADD	= @LIBCURL@ @JANSSON_LIBS@ @PTHREAD_LIBS@