contrib: make build recipes for shell wrappers a bit more generic

Helps the next commit.

Signed-off-by: Johannes Altmanninger <aclopte@gmail.com>

Author: krobelus

contrib/Makefile.am

@@ -17,15 +17,15 @@ EXTRA_DIST = \
 	$(SCRIPTS_IN) \
 	$(noinst_DATA)
 
-mc.csh: $(top_builddir)/config.status $(srcdir)/mc.csh.in
-	$(SED) "s%@""pkglibexecdir@%$(pkglibexecdir)%" $(srcdir)/mc.csh.in > mc.csh
+mc.csh: $(top_builddir)/config.status $@.in
+	$(SED) "s%@""pkglibexecdir@%$(pkglibexecdir)%" $@.in > $@
 
-mc.sh: $(top_builddir)/config.status $(srcdir)/mc.sh.in
-	$(SED) "s%@""pkglibexecdir@%$(pkglibexecdir)%" $(srcdir)/mc.sh.in > mc.sh
+mc.sh: $(top_builddir)/config.status $@.in
+	$(SED) "s%@""pkglibexecdir@%$(pkglibexecdir)%" $@.in > $@
 
-mc-wrapper.csh: $(top_builddir)/config.status $(srcdir)/mc-wrapper.csh.in
-	$(SED) "s%@""bindir@%$(bindir)%" $(srcdir)/mc-wrapper.csh.in > mc-wrapper.csh
+mc-wrapper.csh: $(top_builddir)/config.status $@.in
+	$(SED) "s%@""bindir@%$(bindir)%" $@.in > $@
 
-mc-wrapper.sh: $(top_builddir)/config.status $(srcdir)/mc-wrapper.sh.in
-	$(SED) "s%@""bindir@%$(bindir)%" $(srcdir)/mc-wrapper.sh.in > mc-wrapper.sh
+mc-wrapper.sh: $(top_builddir)/config.status $@.in
+	$(SED) "s%@""bindir@%$(bindir)%" $@.in > $@