Make call to subscript use absolute path over relative

If this was called outside of tools directory, it would
fail due to gen_sha.sh being in the tools directory. So
make the call to it not dependent on a relative location.

Test: generated manifest
Change-Id: I08dd7ef615b625c26eed9de16b15f20d2412df69
1 file changed
tree: 67039237789ea434377afa5c6144a2ecc7be087c
  1. common/
  2. guest/
  3. host/
  4. tests/
  5. tools/
  6. Android.bp
  7. Android.mk
  8. OWNERS
  9. TEST_MAPPING