Defer application of init.meta.json until after init Lua files. (#549)

Fixes #546.

rojo-test/build-test-snapshots/end_to_end__tests__build__issue_546.snap

@@ -0,0 +1,14 @@
+---
+source: tests/tests/build.rs
+assertion_line: 98
+expression: contents
+---
+<roblox version="4">
+  <Item class="LocalScript" referent="0">
+    <Properties>
+      <string name="Name">issue_546</string>
+      <bool name="Disabled">true</bool>
+      <string name="Source">print("Hello, world!")</string>
+    </Properties>
+  </Item>
+</roblox>

rojo-test/build-tests/issue_546/README.md

@@ -0,0 +1,2 @@
+# Issue #546 (https://github.com/rojo-rbx/rojo/issues/546)
+Regression from Rojo 6.2.0 to Rojo 7.0.0. Meta files named as init.meta.json should apply after init.client.lua and other init files.

rojo-test/build-tests/issue_546/default.project.json

@@ -0,0 +1,6 @@
+{
+  "name": "issue_546",
+  "tree": {
+    "$path": "hello"
+  }
+}

rojo-test/build-tests/issue_546/hello/init.client.lua

@@ -0,0 +1 @@
+print("Hello, world!")

rojo-test/build-tests/issue_546/hello/init.meta.json

@@ -0,0 +1,5 @@
+{
+  "properties": {
+    "Disabled": true
+  }
+}