simpleperf: output text format for autofdo in inject cmd.

Also add --binary option to selected binaries for generating data.
Because AutoFDO only accepts one binary input.

Test it manually with a simple example as below:
1. on device, run `./simpleperf record -e cs-etm:u ./etm_test_multi_thread`.
2. on device, run `./simpleperf inject --binary test_loop_b`.
3. on host, run `adb pull /data/local/tmp/perf_inject.data`.
4. on host, run `./create_llvm_prof -binary=libetm_test_loop_b.so
-profile=perf_inject.data -profiler=text -out=a`.

And create_llvm_prof can generate output successfully.

Bug: 141013987
Test: run simpleperf_unit_test.
Change-Id: Iacc0e3ed4cc47c91d5764e7b0394718436211514

1 files changed, 10 insertions, 0 deletions

diff --git a/simpleperf/utils.h b/simpleperf/utils.h
index 3ca8f5cf..872e191d 100644
--- a/simpleperf/utils.h
+++ b/simpleperf/utils.h
@@ -163,4 +163,14 @@ timeval SecondToTimeval(double time_in_sec);
 
 std::string GetSimpleperfVersion();
 
+namespace {
+
+// from boost::hash_combine
+template <typename T>
+void HashCombine(size_t& seed, const T& val) {
+  seed ^= std::hash<T>()(val) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
+}
+
+}  // namespace
+
 #endif  // SIMPLE_PERF_UTILS_H_