Remove the bubblesort_quick test.

It was strange that we had two variations on bubble sort that only
varied on the number of times the benchmark loop was run.  The
user can always adjust the SCALE_FACTOR to run a test more or less if
they wish.

ChangeLog:

	* src/bubblesort/Makefile.am: Remove bubblesort_quick test.
	* src/bubblesort/Makefile.in: Regenerate.
	* src/bubblesort/bubblesort.c (BUBBLESORT_RSHIFT): Remove.
	(SCALE_FACTOR): No longer rely on BUBBLESORT_RSHIFT.