[bug #102] Make prints an incorrect error for missing includes

Update of bug #102 (project make): Triage Status:None => Verified ___ Follow-up Comment #8: Added a test for this to the test suite (add -all to see it). _

[bug #2216] MAKEFLAGS not updated when it already exists

Update of bug #2216 (project make): Triage Status:None => Verified ___ Follow-up Comment #1: Added a test for this to the regression suite. ___

[bug #26864] make -j2 fails to rebuild intermediate file

Update of bug #26864 (project make): Triage Status: Medium Effort => Verified ___ Follow-up Comment #2: I added a test for this into the test suite. I did some back-tracking and this bug was introduced

[bug #22531] Make 3.81 May Incorrectly Regard Object Dependencies as Complete

Update of bug #22531 (project make): Status:None => Fixed Open/Closed:Open => Closed Fixed Release:None => CVS