Update regexes for gminer to support multiple GPUs

[darknicht66]

mm.js currently only grabs the hashrate from the first GPU when benchmarking gminer. This updates the current regexes to return the total hashrate value if more than one GPU exists.

Example 1 - GMiner output for single GPU:

+---+-------+-----------+--------+------+-----+-------------+
| ID   GPU      Speed     Shares   Best  Power  Efficiency  |
+---+-------+-----------+--------+------+-----+-------------+
|  0  1070Ti  27.09 MH/s  259/0/0 73.68G 127 W  213.33 KH/W |
+---+-------+-----------+--------+------+-----+-------------+

Example 2 - GMiner output for multi-GPU:

+---+-----+-----------+--------+------+-----+-------------+
| ID  GPU     Speed     Shares   Best  Power  Efficiency  |
+---+-----+-----------+--------+------+-----+-------------+
|  0  3080  51.74 MH/s   42/0/0 900.6G 181 W  285.88 KH/W |
|  1  3080  54.32 MH/s   54/0/0 666.3G 185 W  293.61 KH/W |
|  2  3080  55.67 MH/s   47/0/0 653.3G 187 W  297.70 KH/W |
|  3  3080  55.61 MH/s   40/0/0 5.960T 210 W  264.82 KH/W |
|  4  3080  54.83 MH/s   48/0/0 505.7G 193 W  284.07 KH/W |
|          272.17 MH/s  231/0/0 5.960T 956 W  284.69 KH/W |
+---+-----+-----------+--------+------+-----+-------------+

Previously mm.js would return the hashrate of GPU 0 for both examples. i.e. 27.09 for example 1 and 51.74 for example 2. With the updated regexes it now returns the total hashrate in both examples... 27.09 for example 1 and 272.17 for example 2.