Fix include paths and distclean
https://github.com/mej/libast/issues/2
https://github.com/mej/libast/commit/c6a008f51b38014e7620937bd13ca312dfdeeed5
--- Makefile.am.orig
+++ Makefile.am
@@ -10,6 +10,7 @@ macrodir = $(datadir)/aclocal
 EXTRA_DIST = DESIGN LICENSE README $(MACROS) libast.spec
 MAINTAINERCLEANFILES = Makefile.in *~ aclocal.m4 config.guess config.sub configure depcomp \
     install-sh ltconfig ltmain.sh missing mkinstalldirs stamp-h* *.log config.h.in
+DISTCLEANFILES = Makefile
 
 test: all
 	cd test && $(MAKE) test
--- include/Makefile.am.orig
+++ include/Makefile.am
@@ -7,7 +7,7 @@ nobase_include_HEADERS = libast.h libast/array.h libast/avl_tree.h	\
 	libast/thread_if.h libast/tok.h libast/url.h libast/ustr.h	\
 	libast/vector_if.h
 
-nodist_include_HEADERS = libast/sysdefs.h libast/types.h
+nobase_nodist_include_HEADERS = libast/sysdefs.h libast/types.h
 noinst_HEADERS = libast_internal.h
 
 libast/types.h: libast/types.h.in
@@ -17,4 +17,4 @@ libast/sysdefs.h: libast/sysdefs.h.in
 	cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@
 
 MAINTAINERCLEANFILES = Makefile.in
-DISTCLEANFILES = libast/sysdefs.h libast/types.h
+DISTCLEANFILES = Makefile libast/sysdefs.h libast/types.h
--- src/Makefile.am.orig
+++ src/Makefile.am
@@ -2,7 +2,7 @@
 
 lib_LTLIBRARIES = libast.la
 
-INCLUDES = -I$(top_srcdir)/include -I$(top_srcdir)/include/$(PACKAGE)
+AM_CPPFLAGS = -I../include -I$(top_srcdir)/include -I$(top_srcdir)/include/$(PACKAGE)
 AM_CFLAGS = $(PTHREAD_CFLAGS)
 AM_LDFLAGS = $(PTHREAD_LIBS)
 
@@ -13,3 +13,4 @@ snprintf.c tok.c url.c ustr.c
 
 libast_la_LDFLAGS = -version-info 2:2:0
 MAINTAINERCLEANFILES = Makefile.in
+DISTCLEANFILES = Makefile
--- test/Makefile.am.orig
+++ test/Makefile.am
@@ -1,6 +1,6 @@
 EXTRA_PROGRAMS = libast-test libast-perf
 
-INCLUDES = -I$(top_srcdir)/include -I$(top_srcdir)/include/$(PACKAGE)
+AM_CPPFLAGS = -I../include -I$(top_srcdir)/include -I$(top_srcdir)/include/$(PACKAGE)
 
 libast_test_SOURCES = test.c test.h
 libast_test_DEPENDENCIES = $(top_builddir)/src/libast.la
@@ -20,3 +20,4 @@ perf: libast-perf
 
 .PHONY: test
 MAINTAINERCLEANFILES = Makefile.in
+DISTCLEANFILES = Makefile