Cherry-pick CL 1250286 from SC stg.

HSA Finalizer: Add dumping of code object, ISA and executable to loader.

This is controlled by loader options -dump-all, -dump-isa, -dump-code, -dump-exec

The options can now also be set with env variable LOADER_OPTIONS_APPEND.

Added tests to finalizer_offline

Testing: smoke, dumping on hardware

Reviewed by: Konstantin Zhuravlyov

[git-p4: depot-paths = "//depot/stg/hsa/drivers/hsa/runtime/": change = 1255351]

runtime/hsa-runtime/libamdhsacode/amd_hsa_code_util.cpp

@@ -47,6 +47,7 @@
 #include <iomanip>
 #include <cassert>
 #include <algorithm>
+#include <sstream>
 #ifdef _WIN32
 #include <Windows.h>
 #include <io.h>
@@ -1029,5 +1030,20 @@ void ltrim(std::string &str) {
   str.erase(str.begin(), std::find_if(str.begin(), str.end(), IsNotSpace));
 }
 
+std::string DumpFileName(const std::string& dir, const char* prefix, const char* ext, unsigned n, unsigned i)
+{
+  std::ostringstream ss;
+  if (!dir.empty()) {
+    ss << dir << "/";
+  }
+  ss <<
+    prefix <<
+    std::setfill('0') << std::setw(3) << n;
+  if (i) { ss << "_" << i; }
+  if (ext) { ss << "." << ext; }
+  return ss.str();
+}
+
+
 }
 }