open-vm-tools fixes from Delphix.

Full pull from their eba7e754688c334530597e4e8e2f33a32986e948
	28773 vmtoolsd dies with SIGABRT
Partial pull from their 5dec865b901d8e1f4fc0b7111191aee9b69b4cfc
	32104 pkg-build-gate changes for omniossync