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-lang/swi_prolog/swi_prolog-6.2.0.recipe

@@ -0,0 +1,32 @@
+DESCRIPTION="SWI Prolog. Stable and free standard Prolog implementation"
+HOMEPAGE="http://www.swi-prolog.org/"
+SRC_URI="http://www.swi-prolog.org/download/stable/src/pl-6.2.0.tar.gz"
+CHECKSUM_MD5="969ed2e00b7afc1537fbf19d667333c5"
+REVISION="1"
+STATUS_HAIKU="stable"
+DEPEND="dev-libs/gmp >= 5.0.5
+		sys-libs/readline >= 6.2"
+BUILD()
+{
+		cd pl-6.2.0/src
+		libtoolize -fci
+		autoreconf
+		LDFLAGS=-L/boot/common/lib CFLAGS=-I/boot/common/include ./configure --prefix=$(finddir B_COMMON_DIRECTORY)
+		make
+}
+
+INSTALL()
+{
+		cd pl-6.2.0/src
+		make install
+}
+
+TEST()
+{
+		cd pl-6.2.0/src
+		make check
+}
+
+LICENSE="GNU LGPL v2.1
+		SWI-Prolog"
+COPYRIGHT="1985-2012, University of Amsterdam, VU University Amsterdam"