Log Message:
Update upx to version 1.25.  This addresses PR#29327.
Changes include:
  * INFO: http://upx.sourceforge.net is the permanent UPX home page
  * watcom/le: don't crash on files without relocations
  * win32/pe: stricter checks of some PE values
  * source code: much improved portability using ACC, the
    Automatic Compiler Configuration
  * source code: compile fixes for strict ISO C++ compilers
  * source code: compile fixes for Win64