Cleanup: fix names of recipe and patch files.

* this fixes the wrong recipe names introduced by myself in #d525fee
* adjust patch names to match corresponding recipes
* additionally: create 'additional-files' folders as hint to some
  ports that do not have a proper recipe yet

dev-libs/boehm_gc/boehm_gc-7.2d.recipe

@@ -0,0 +1,36 @@
+DESCRIPTION="The Boehm-Demers-Weiser conservative garbage collector"
+HOMEPAGE="http://www.hpl.hp.com/personal/Hans_Boehm/gc/"
+SRC_URI="http://www.hpl.hp.com/personal/Hans_Boehm/gc/gc_source/gc-7.2d.tar.gz"
+REVISION="1"
+STATUS_HAIKU="stable"
+DEPEND=""
+CHECKSUM_MD5="91340b28c61753a789eb6077675d87d2"
+
+BUILD()
+{
+	cd gc-7.2
+	libtoolize --force --copy --install
+	autoconf -f
+	./configure --prefix=$(finddir B_COMMON_DIRECTORY) \
+	--datadir=$(finddir B_COMMON_DOCUMENTATION_DIRECTORY) \
+	--enable-threads=posix --enable-thread-local-alloc --enable-parallel-mark
+	make
+}
+
+INSTALL()
+{
+	cd gc-7.2
+	make install
+}
+
+TEST()
+{
+	cd gc-7.2
+	make check
+}
+
+LICENSE="BOEHM"
+COPYRIGHT="1988, 1989 Hans-J. Boehm, Alan J. Demers
+	1991-1996 by Xerox Corporation.  All rights reserved.
+	1996-1999 by Silicon Graphics.  All rights reserved.
+	1999-2011 Hewlett-Packard Development Company, L.P."