For drgui, if cmake < 2.8.10 is used, simply do not build drgui rather than issuing a fatal error.  We can revert to a fatal error once Qt5 and cmake 2.8.10 are more widespread, but as of now too many systems fail to meet one or the other.
For drgui, if cmake < 2.8.10 is used, simply do not build drgui rather than
issuing a fatal error.  We can revert to a fatal error once Qt5 and cmake
2.8.10 are more widespread, but as of now too many systems fail to meet one
or the other.

SVN-Revision: 2275

sigma-random/dynamorio,bl4ckic3/dynamorio,AmesianX/dynamorio,daksunt/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio,daksunt/dynamorio,sigma-random/dynamorio,code4bones/dynamorio,code4bones/dynamorio,daksunt/dynamorio,bl4ckic3/dynamorio,code4bones/dynamorio,AmesianX/dynamorio,bl4ckic3/dynamorio,daksunt/dynamorio,sigma-random/dynamorio,bl4ckic3/dynamorio,AmesianX/dynamorio,sigma-random/dynamorio,sigma-random/dynamorio,bl4ckic3/dynamorio,daksunt/dynamorio,code4bones/dynamorio,code4bones/dynamorio