Use layout.path when rendering the Liquid layout

[ashmaroli]

• This is a 🐛 bug fix.

Summary

So that Jekyll's LiquidRenderer can correctly differentiate between layout from source vs layout from theme.

The bug can be identified in the --profile output:

| Filename                                     | Count |  Bytes |  Time |
+----------------------------------------------+-------+--------+-------+
| _posts/2020-03-20-welcome-to-jekyll.markdown |     1 |  1.68K | 0.181 |
| _layouts/default.html                        |     4 | 20.33K | 0.032 |
| minima-2.5.1/_includes/head.html             |     4 |  7.22K | 0.023 |
| feed.xml                                     |     1 |  4.00K | 0.007 |
| minima-2.5.1/_includes/header.html           |     4 |  3.96K | 0.004 |
| minima-2.5.1/_includes/footer.html           |     4 |  4.65K | 0.003 |
| _layouts/post.html                           |     1 |  2.45K | 0.003 |
| minima-2.5.1/_includes/social.html           |     4 |  1.56K | 0.002 |
| _layouts/home.html                           |     1 |  0.38K | 0.002 |
| _layouts/page.html                           |     1 |  0.67K | 0.000 |
+----------------------------------------------+-------+--------+-------+
| TOTAL (for 10 files)                         |    25 | 46.88K | 0.257 |

After fix:

| Filename                                     | Count |  Bytes |  Time |
+----------------------------------------------+-------+--------+-------+
| _posts/2020-03-22-welcome-to-jekyll.markdown |     1 |  1.68K | 0.150 |
| minima-2.5.1/_layouts/default.html           |     4 | 20.33K | 0.021 |
| minima-2.5.1/_includes/head.html             |     4 |  7.22K | 0.013 |
| feed.xml                                     |     1 |  4.00K | 0.012 |
| minima-2.5.1/_includes/header.html           |     4 |  3.96K | 0.004 |
| minima-2.5.1/_includes/footer.html           |     4 |  4.65K | 0.003 |
| minima-2.5.1/_includes/social.html           |     4 |  1.56K | 0.002 |
| minima-2.5.1/_layouts/post.html              |     1 |  2.45K | 0.002 |
| minima-2.5.1/_layouts/home.html              |     1 |  0.38K | 0.001 |
| minima-2.5.1/_layouts/page.html              |     1 |  0.67K | 0.000 |
+----------------------------------------------+-------+--------+-------+
| TOTAL (for 10 files)                         |    25 | 46.88K | 0.209 |

[DirtyF]

Good catch!

[ashmaroli]

@jekyllbot: merge +fix