Fix issue with adbd patch striplevel

0001-Allow-adbd-to-be-ran-as-root.patch contains paths with 'a/', 'b/' prefixes which need to be stripped.

```
Applying patch 0001-Allow-adbd-to-be-ran-as-root.patch
can't find file to patch at input line 14
Perhaps you used the wrong -p or --strip option?
```

recipes-devtools/android-tools/android-tools_%.bbappend

 FILESEXTRAPATHS_prepend := "${THISDIR}/android-tools:"
-SRC_URI += " file://0001-Allow-adbd-to-be-ran-as-root.patch "
+SRC_URI += " file://0001-Allow-adbd-to-be-ran-as-root.patch;striplevel=1 "