Merge pull request #3885

01e5327 build: hook up "make deploy" for cross osx builds (Cory Fields)
c4a10db build: ensure the correct strip is used for osx/win32 (Cory Fields)
b62bbb1 build: if cross-compiling for an apple host, locate some additional tools (Cory Fields)
0f21d39 build: fix qt.conf case-sensitivity in the deployed dmg (Cory Fields)
275d6a3 build: allow correct tools to be used for dmg creation. (Cory Fields)