[docs] Update test documentation for INPUTS move

Author: benlangmuir

Documentation/Development.md

@@ -20,10 +20,10 @@ Most indexer tests follow a pattern:
 
 ### Test Projects (Fixtures)
 
-Index test projects should be put in the `Tests/INPUTS` directory, and use the [Tibs](Tibs.md) build system to define their sources and targets. An example test project might look like:
+Index test projects should be put in the `ISDBTestSupport/INPUTS` directory, and use the [Tibs](Tibs.md) build system to define their sources and targets. An example test project might look like:
 
 ```
-Tests/
+ISDBTestSupport/
   INPUTS/
     MyTestProj/
       a.swift

Documentation/Tibs.md

@@ -4,7 +4,7 @@ Tibs ("Test Index Build System") is a simple and flexible build system designed
 
 Tibs is implemented using [Ninja](https://ninja-build.org), which introduces a new dependency in IndexStoreDB when running tests.
 
-Tibs projects are described by a `project.json` file containing one or more targets. Typically, a test case will use a project fixture located in the `Tests/INPUTS` directory.
+Tibs projects are described by a `project.json` file containing one or more targets. Typically, a test case will use a project fixture located in the `INPUTS` directory.
 
 ## Project