Suppose a file is transformed by GCC but has no instrumentation turned on.
The result of compiling that file should be the same as compiling the
original file:  their .o files should be identical.

We use some "representative" programs to test this:

SHAR:
	getopt.c*
	shar.c*
	traverse.c*

The GNU C preprocessor:
	cccp.c
	config.h

Other parts of GCT itself:
	stmt.c 
	expr.c 
	c-typeck.c 
	(etc.)
These are compiled only if the file TEST-ALL is present.
