libdpkg: Rename compression.c to compress.c

lib/dpkg/Makefile.am

@@ -21,7 +21,7 @@ libdpkg_a_SOURCES = \
 	dlist.h \
 	buffer.c buffer.h \
 	cleanup.c \
-	compression.c \
+	compress.c \
 	database.c \
 	dbmodify.c \
 	dump.c \

lib/dpkg/compression.c

@@ -1,6 +1,6 @@
 /*
  * libdpkg - Debian packaging suite library routines
- * compression.c - compression support functions
+ * compress.c - compression support functions
  *
  * Copyright © 2000 Wichert Akkerman <wakkerma@debian.org>
  * Copyright © 2004 Scott James Remnant <scott@netsplit.com>