Added RPM spec.in version to EXTRA_DIST.

Makefile.am.newautomake

@@ -127,6 +127,7 @@ EXTRA_DIST =	\
 	TODO \
 	Doxyfile \
 	CWProjects.sit \
+	physfs.spec.in \
 	physfs.spec \
 	physfs.dsp \
 	test_physfs.dsp \

Makefile.am.oldautomake

@@ -33,6 +33,7 @@ EXTRA_DIST =	\
 	TODO \
 	Doxyfile \
 	CWProjects.sit \
+	physfs.spec.in \
 	physfs.spec \
 	physfs.dsp \
 	test_physfs.dsp \