Bump up timeout in AdbClient

now that the timeout actually means something, we see that sometimes adb is just really slow in
replying to the DONE packet during file push. Give it more time to complete.

llvm-svn: 268623

lldb/source/Plugins/Platform/Android/AdbClient.cpp

@@ -34,7 +34,7 @@ using namespace lldb_private::platform_android;
 
 namespace {
 
-const std::chrono::seconds kReadTimeout(4);
+const std::chrono::seconds kReadTimeout(6);
 const char * kOKAY = "OKAY";
 const char * kFAIL = "FAIL";
 const char * kDATA = "DATA";