Fix two testcases for ssa names which are more than 1 digit

Fix two testcases for ssa names which are more than 1 digit

phi-opt-10.c and phi-opt-7.c both depend on currently that some ssa name
versions are one digit long which is not always correct. This fixes the
problem by detecting digits rather than just using '.'.

Committed as obvious after a bootstrap/test.

Thanks,
Andrew Pinski

gcc/testsuite/ChangeLog
	* gcc.dg/tree-ssa/phi-opt-10.c: Use "\[0-9\]*" instead of '.'
	when matching ssa name version.
	* gcc.dg/tree-ssa/phi-opt-7.c: Likewise.