make: on error, print the targets to be made

This helps to understand situations with several nested sub-makes in
varying directories.

branches: 1.2.8;
make(1): fix error handling for dependency of .END in -k mode

Fix one bug, find 4 new ones. All these bugs have been around since
2005-05-08, when dependencies on the .BEGIN, .END and .INTERRUPT nodes
were implemented. Before that, checking gn->made == ERROR was
appropriate, but adding the dependencies made ABORTED a new possible
error value from Compat_Make.

make(1): add test for error in dependency of .END node in -k mode