ranger: Grow BBs in relation oracle as needed [PR113735]

The relation oracle grows the internal vector of SSAs as needed, but
due to an oversight was not growing the basic block vector.  This
fixes the oversight.

	PR tree-optimization/113735

gcc/testsuite/ChangeLog:

	* gcc.dg/tree-ssa/pr113735.c: New test.

gcc/ChangeLog:

	* value-relation.cc (equiv_oracle::add_equiv_to_block): Call
	limit_check().