emulators/open-vm-tools: Update to 12.5.0

While here, fix build with llvm 19 [1]

PR: 282277, 282476 [1]
Submitted by: dim [1]
Sponsored by: Rubicon Communications, LLC ("Netgate")

(cherry picked from commit e291bf88f70671902bc5d79ac89f74bba0222069)