SmartOS/live 4a90933tools/builder Makefile

OS-7787 make clean fails if ./tools/builder is already clean
Reviewed by: Josh Wilsdon <jwilsdon at joyent.com>
Approved by: Josh Wilsdon <jwilsdon at joyent.com>
DeltaFile
+2-2tools/builder/Makefile
+2-21 files

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