Handle multiple blueprint files in one dir

If there are multiple blueprint files in one directory, say an
Android.bp, and a build=['other.bp'] entry that pulls in another
blueprint file from the same directory, we'd look for a matching
Android.mk twice. This would cause duplicate glob rules.

Instead, keep track of blueprint directories rather than files.

Change-Id: I4f224e51337ffd5e5e48257ac3458c2d8b2061fa
1 file changed