Replaced whole bunch for Makefiles with a single generic Makefile.

- No complex shell logic.
- "Source file shadowing" for all targets via vpath.
- Dependency handling.
- True incremental build.
- Don't write into source directories.
- Easy cleanup by just removing 'wrk'.

libsrc/geos-common/disk/Makefile

@@ -1,19 +0,0 @@
-#
-# makefile for CC65 runtime library
-#
-
-#--------------------------------------------------------------------------
-# Object files
-
-S_OBJS +=	blkalloc.o		\
-		calcblksfree.o		\
-		freeblock.o		\
-		getblock.o		\
-		getdirhead.o		\
-		getptrcurdknm.o		\
-		gettrse.o		\
-		nxtblkalloc.o		\
-		opendisk.o		\
-		putblock.o		\
-		putdirhead.o		\
-		setnextfree.o