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/system/tgi_stddrv.s

@@ -0,0 +1,14 @@
+;
+; Name of the standard tgi driver
+;
+; Oliver Schmidt, 2011-05-02
+;
+; const char tgi_stddrv[];
+;
+
+	    .export _tgi_stddrv
+
+.rodata
+
+_tgi_stddrv:
+	.asciiz "geos-tgi.tgi"