Add `/Application/Xcode-beta.app/…` to `LD_RUNPATH_SEARCH_PATHS`
Add `/Application/Xcode-beta.app/…` to `LD_RUNPATH_SEARCH_PATHS`

By applying this, search paths will be following:
- Builded by Xcode.app # Homebrew build will be this.
```
/Application/Xcode.app/Toolchains/XcodeDefault.xctoolchain/usr/lib # builded toolchain is first for debugging.
/Application/Xcode.app/Toolchains/XcodeDefault.xctoolchain/usr/lib # duplicated, but no problems occurred by this.
/Application/Xcode-beta.app/Toolchains/XcodeDefault.xctoolchain/usr/lib
```
- Builded by Xcode-beta.app
```
/Application/Xcode-beta.app/Toolchains/XcodeDefault.xctoolchain/usr/lib # builded toolchain is first for debugging.
/Application/Xcode.app/Toolchains/XcodeDefault.xctoolchain/usr/lib
/Application/Xcode-beta.app/Toolchains/XcodeDefault.xctoolchain/usr/lib # duplicated,but no problems occurred by this.
```

jpsim/SourceKitten,jpsim/SourceKitten,jpsim/SourceKitten,jpsim/SourceKitten,jpsim/SourceKitten