Fix build with ToT libc++

system/extras/simpleperf/utils.h:81:53: error: no matching constructor for initialization of 'std::ifstream' (aka 'basic_ifstream<char>')
   81 |   explicit LineReader(std::string_view file_path) : ifs_(file_path) {}
      |                                                     ^    ~~~~~~~~~

Test: Build with ToT libc++
Change-Id: I45a12b7cee66b35c8859bb5f71c7784d1dfc4f74
1 file changed