Parse the gfp_flags field based on kernel version

Added the system info to the metadata table to access it later.

Test: ?s=85868ac21895a821afcd72abe40b76ae5248cc1cd5429559a553519f115a7
Query: select to_ftrace(id) from raw

Bug:117966147
Change-Id: Id942c4e410783c42529634309e6970b7d29ceaae
diff --git a/Android.bp b/Android.bp
index 44db57c..be293bf 100644
--- a/Android.bp
+++ b/Android.bp
@@ -4556,6 +4556,7 @@
     "src/trace_processor/counter_values_table.cc",
     "src/trace_processor/cpu_profile_stack_sample_table.cc",
     "src/trace_processor/filtered_row_index.cc",
+    "src/trace_processor/gfp_flags.cc",
     "src/trace_processor/heap_profile_allocation_table.cc",
     "src/trace_processor/instants_table.cc",
     "src/trace_processor/metadata_table.cc",