COMP: Update CastXML to 2019-07-15 master
COMP: Update CastXML to 2019-07-15 master

Adds ppc64le support to fix #1078.

InsightSoftwareConsortium/ITK,Kitware/ITK,LucasGandel/ITK,hjmjohnson/ITK,vfonov/ITK,BRAINSia/ITK,hjmjohnson/ITK,thewtex/ITK,hjmjohnson/ITK,malaterre/ITK,BRAINSia/ITK,BRAINSia/ITK,malaterre/ITK,richardbeare/ITK,Kitware/ITK,thewtex/ITK,LucasGandel/ITK,InsightSoftwareConsortium/ITK,hjmjohnson/ITK,LucasGandel/ITK,malaterre/ITK,richardbeare/ITK,Kitware/ITK,InsightSoftwareConsortium/ITK,InsightSoftwareConsortium/ITK,LucasGandel/ITK,InsightSoftwareConsortium/ITK,BRAINSia/ITK,hjmjohnson/ITK,BRAINSia/ITK,LucasGandel/ITK,Kitware/ITK,BRAINSia/ITK,vfonov/ITK,vfonov/ITK,vfonov/ITK,richardbeare/ITK,thewtex/ITK,hjmjohnson/ITK,InsightSoftwareConsortium/ITK,malaterre/ITK,richardbeare/ITK,hjmjohnson/ITK,thewtex/ITK,thewtex/ITK,malaterre/ITK,vfonov/ITK,malaterre/ITK,LucasGandel/ITK,Kitware/ITK,Kitware/ITK,Kitware/ITK,richardbeare/ITK,richardbeare/ITK,LucasGandel/ITK,malaterre/ITK,richardbeare/ITK,vfonov/ITK,vfonov/ITK,thewtex/ITK,LucasGandel/ITK,malaterre/ITK,thewtex/ITK,malaterre/ITK,vfonov/ITK,vfonov/ITK,InsightSoftwareConsortium/ITK,BRAINSia/ITK