test_some: wrong type for last argument `cmp_value`

[dalcinl]

The proper signature is:

size_t shmem_TYPENAME_test_some(TYPE *ivars, size_t nelems, size_t *indices, 
                                const int *status, int cmp, TYPE cmp_value);

that is, the last argument should be TYPE cmp_value, and not TYPE* cmp_values as it is now.

[dalcinl]

@yfguo You may want to take this one.

[dalcinl]

@mrogowski This issue will prevent our Python wrappers to compile.