Add OWNERS in prebuilts/sdk/tools

* Owners are selected from top CL approvals or owners.
  They will be suggested to review/approve future CLs.
* OWNERS files are recognized by the new find-owners plugin, see .md files in
  https://gerrit.googlesource.com/plugins/find-owners/+/master/src/main/resources/Documentation/

Test: build/make/tools/checkowners.py -c -v OWNERS
Change-Id: I0530678c5a1372201a00fa49717e95907a071f67
diff --git a/tools/OWNERS b/tools/OWNERS
new file mode 100644
index 0000000..b4ab537
--- /dev/null
+++ b/tools/OWNERS
@@ -0,0 +1,11 @@
+per-file *jack* = benoitlamarche@google.com
+per-file *jack* = jplesot@google.com
+
+per-file *jill* = benoitlamarche@google.com
+per-file *jill* = jplesot@google.com
+
+benoitlamarche@google.com # jack/jill
+jplesot@google.com        # jack/jill
+klyubin@google.com        # signapk
+srhines@google.com        # LLVM
+yroussel@google.com       # MultiDex