Fix scan-tree-dump for scop-19.c

[Tom de Vries]

Hi,

I've observed a FAILURE for gcc.dg/graphite/scop-19.c with fpic:
...
FAIL: gcc.dg/graphite/scop-19.c scan-tree-dump-times graphite "number of SCoPs: 0" 2
...

In the nonpic case, d_growable_string_resize is inlined into 
d_growable_string_append_buffer, and we have 2 functions with a loop, wich 
results in two 'number of SCoPs' entries.

In the pic case, d_growable_string_resize is not inlined into 
d_growable_string_append_buffer (since it's not inlinable), and we have only one 
function with a loop, wich results in one 'number of SCoPs' entry.

This patch updates the scan-tree-dump to match the pic/nonpic behaviour.

OK for trunk?

Thanks,
- Tom
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