[PR] bolt_rt: getBinaryPath() increase max file path

Summary:
Increase the hard limit from 256 to 4096.
This fixes the 'Assertion failed: failed to open binary path' error I'm seeing.

(cherry picked from FBD31911946)

Author: undingen

bolt/runtime/instr.cpp

@@ -611,7 +611,7 @@ bool parseAddressRange(const char *Str, uint64_t &StartAddress,
 /// /proc/self/map_files
 static char *getBinaryPath() {
   const uint32_t BufSize = 1024;
-  const uint32_t NameMax = 256;
+  const uint32_t NameMax = 4096;
   const char DirPath[] = "/proc/self/map_files/";
   static char TargetPath[NameMax] = {};
   char Buf[BufSize];