Fix 'scons dist'

This makes 'scons dist' work, although the resulting tarballs are not
yet identical to cmake tarballs.

Remove awk usage made obsolete by the git transition
(7f85fa0).

Update src/revision.hpp reference to use src/revision.h.  The former
name is unused since at least 7625b1e.

SConstruct

@@ -762,11 +762,11 @@ if 'dist' in COMMAND_LINE_TARGETS:    # Speedup, the manifest is expensive
     def dist_manifest():
         "Get an argument list suitable for passing to a distribution archiver."
         # Start by getting a list of all files under version control
-        lst = subprocess.check_output("git ls-files | grep -v 'data\/test\/.*' | awk '/^[^?]/ {print $4;}'", shell=True).split()
+        lst = subprocess.check_output("git ls-files | grep -v 'data\/test\/.*'", shell=True).splitlines()
         lst = filter(os.path.isfile, lst)
         return lst
     dist_tarball = env.Tar('wesnoth-${version}.tar.bz2', [])
-    open("dist.manifest", "w").write("\n".join(dist_manifest() + ["src/revision.hpp"]))
+    open("dist.manifest", "w").write("\n".join(dist_manifest() + ["src/revision.h"]))
     env.Append(TARFLAGS='-j -T dist.manifest --transform "s,^,wesnoth-$version/,"',
                TARCOMSTR="Making distribution tarball...")
     env.AlwaysBuild(dist_tarball)