4.3
[SV 40657] Reinstate old behavior for suffix rules with prereqs
Port functions/shell test to Solaris 10
* job.c (child_error): Modify error message string.
Support the .EXTRA_PREREQS special variable
Refresh the test suite framework implementation.
Update the test template. A few fixes in run_make_test(). Rename implicit_prereq_eval to patternrules, to be the start of a suite of tests of pattern rules.