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/conio/Makefile

@@ -1,18 +0,0 @@
-#
-# makefile for CC65 runtime library
-#
-
-#--------------------------------------------------------------------------
-# Object files
-
-S_OBJS +=	_scrsize.o	\
-		cclear.o	\
-		cgetc.o		\
-		chline.o	\
-		clrscr.o	\
-		cputc.o		\
-		cvline.o	\
-		dummies.o	\
-		gotoxy.o	\
-		kbhit.o		\
-		where.o