Use $(location) to find path to tools

Hardcoding the full path to the tool is incorrect when the tool is
sandboxed, use $(location) instead.

Test: builds
Change-Id: I5d150a52b84f6926726768ba7aadfc2522d561fd
1 file changed
tree: ffe111eb4028b7734ea326cf09545443864ef536
  1. host/
  2. .gitignore
  3. Android.bp
  4. METADATA