configure: switch pkg-dir search to case-insensitive mode. This fixes...
configure: switch pkg-dir search to case-insensitive mode. This fixes --download-openblas [using tarball]
Reported-by: Eda Oktay <eda.oktay@metu.edu.tr>
Suggested-by: Matthew Knepley <knepley@gmail.com>
Edited by Satish Balay