update uncontroversial misc test failures

tests/misc/projects/Issue6878/compile1-fail.hxml.stderr

@@ -1,2 +1,3 @@
-Main1.hx:4: characters 3-11 : Constraint check failure for test.T
-Main1.hx:4: characters 3-11 : Int should be String
+Main1.hx:4: characters 8-10 : Constraint check failure for test.T
+Main1.hx:4: characters 8-10 : Int should be String
+Main1.hx:4: characters 8-10 : For function argument 't'

tests/misc/projects/Issue8787/compile1-fail.hxml.stderr

@@ -1,2 +1,3 @@
-Main1.hx:7: characters 3-6 : Constraint check failure for E.T
-Main1.hx:7: characters 3-6 : Int should be String
+Main1.hx:7: characters 7-9 : Constraint check failure for E.T
+Main1.hx:7: characters 7-9 : Int should be String
+Main1.hx:7: characters 7-9 : For function argument 't'

tests/misc/projects/Issue8787/compile2-fail.hxml.stderr

@@ -1,2 +1,3 @@
-Main2.hx:7: characters 3-6 : Constraint check failure for C.T
-Main2.hx:7: characters 3-6 : Int should be String
+Main2.hx:7: characters 7-9 : Constraint check failure for C.T
+Main2.hx:7: characters 7-9 : Int should be String
+Main2.hx:7: characters 7-9 : For function argument 't'