fix build fail

Author: tesuji

pwnlib/tubes/process.py

@@ -476,7 +476,8 @@ def __on_enoexec(self, exception):
         binfmt helpers installed for QEMU.
         """
         # Get the ELF binary for the target executable
-        binary = pwnlib.elf.ELF(self.executable)
+        from pwnlib.elf import ELF
+        binary = ELF(self.executable)
 
         # If we're on macOS, this will never work.  Bail now.
         # if platform.mac_ver()[0]:
@@ -1385,7 +1386,8 @@ def elf(self):
 
         Returns an ELF file for the executable that launched the process.
         """
-        return pwnlib.elf.ELF(self.executable)
+        from pwn.elf import ELF
+        return ELF(self.executable)
 
     @property
     def corefile(self):