Add executable flag to sbox copy requests

Add a boolean flag to the sbox proto to request the executable bit
to be set after copying a file.  This will be used for sandboxing
tools when copying a file in from the source tree that would
normally get its executable bit set during installation.

Bug: 124313442
Test: sbox_test.go
Change-Id: Ie2c197bb5183ffc1bf63fd6effd175143cd324d4
diff --git a/cmd/sbox/sbox_proto/sbox.pb.go b/cmd/sbox/sbox_proto/sbox.pb.go
index 6584bdf..79bb90c 100644
--- a/cmd/sbox/sbox_proto/sbox.pb.go
+++ b/cmd/sbox/sbox_proto/sbox.pb.go
@@ -156,8 +156,10 @@
 // are relative to is specific to the context the Copy is used in and will be different for
 // from and to.
 type Copy struct {
-	From                 *string  `protobuf:"bytes,1,req,name=from" json:"from,omitempty"`
-	To                   *string  `protobuf:"bytes,2,req,name=to" json:"to,omitempty"`
+	From *string `protobuf:"bytes,1,req,name=from" json:"from,omitempty"`
+	To   *string `protobuf:"bytes,2,req,name=to" json:"to,omitempty"`
+	// If true, make the file executable after copying it.
+	Executable           *bool    `protobuf:"varint,3,opt,name=executable" json:"executable,omitempty"`
 	XXX_NoUnkeyedLiteral struct{} `json:"-"`
 	XXX_unrecognized     []byte   `json:"-"`
 	XXX_sizecache        int32    `json:"-"`
@@ -202,6 +204,13 @@
 	return ""
 }
 
+func (m *Copy) GetExecutable() bool {
+	if m != nil && m.Executable != nil {
+		return *m.Executable
+	}
+	return false
+}
+
 func init() {
 	proto.RegisterType((*Manifest)(nil), "sbox.Manifest")
 	proto.RegisterType((*Command)(nil), "sbox.Command")
@@ -213,21 +222,22 @@
 }
 
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 }