disable ccache direct mode
disable ccache direct mode

The ccache does not appear to be making cahce hits when compiling
SimpleITK's generated code. The direct mode include file modifications
times, but the preprocessor mode does not.

kaspermarstal/SimpleElastix,kaspermarstal/SimpleElastix,kaspermarstal/SimpleElastix,kaspermarstal/SimpleElastix,kaspermarstal/SimpleElastix,kaspermarstal/SimpleElastix,kaspermarstal/SimpleElastix