Do not use an imported target for Vdt

[amadio]

Fixes: ROOT-9751

[phsft-bot]

Starting build on slc6/gcc48, slc6/gcc62, slc6-i686/gcc49, centos7/clang39, centos7/gcc62, centos7/gcc7, fedora28/native, ubuntu16/native, mac1013/native, windows10/vc15 with flags -Dccache=ON
How to customize builds

[phsft-bot]

Build failed on fedora28/native.
See console output.

Warnings:

• /mnt/build/workspace/root-pullrequests-build/root/interpreter/llvm/src/include/llvm/ADT/SmallVector.h:309:11: warning: ‘void* memcpy(void*, const void*, size_t)’ writing to an object of type ‘struct std::pair<void*, long unsigned int>’ with no trivial copy-assignment; use copy-assignment or copy-initialization instead [-Wclass-memaccess]
• /mnt/build/workspace/root-pullrequests-build/root/interpreter/llvm/src/include/llvm/ADT/SmallVector.h:296:13: warning: ‘void* memcpy(void*, const void*, size_t)’ writing to an object of type ‘struct std::pair<clang::CXXRecordDecl*, clang::SourceLocation>’ with no trivial copy-assignment; use copy-assignment or copy-initialization instead [-Wclass-memaccess]
• /mnt/build/workspace/root-pullrequests-build/root/interpreter/llvm/src/include/llvm/ADT/SmallVector.h:296:13: warning: ‘void* memcpy(void*, const void*, size_t)’ writing to an object of type ‘struct std::pair<const clang::CXXMethodDecl*, const clang::CXXMethodDecl*>’ with no trivial copy-assignment; use copy-assignment or copy-initialization instead [-Wclass-memaccess]
• /mnt/build/workspace/root-pullrequests-build/root/interpreter/llvm/src/include/llvm/ADT/SmallVector.h:296:13: warning: ‘void* memcpy(void*, const void*, size_t)’ writing to an object of type ‘struct std::pair<clang::CXXMethodDecl*, const clang::FunctionProtoType*>’ with no trivial copy-assignment; use copy-assignment or copy-initialization instead [-Wclass-memaccess]
• /mnt/build/workspace/root-pullrequests-build/root/interpreter/llvm/src/include/llvm/ADT/SmallVector.h:309:11: warning: ‘void* memcpy(void*, const void*, size_t)’ writing to an object of type ‘struct std::pair<void*, long unsigned int>’ with no trivial copy-assignment; use copy-assignment or copy-initialization instead [-Wclass-memaccess]
• /mnt/build/workspace/root-pullrequests-build/root/interpreter/llvm/src/include/llvm/ADT/SmallVector.h:309:11: warning: ‘void* memcpy(void*, const void*, size_t)’ writing to an object of type ‘struct std::pair<void*, long unsigned int>’ with no trivial copy-assignment; use copy-assignment or copy-initialization instead [-Wclass-memaccess]
• /mnt/build/workspace/root-pullrequests-build/root/interpreter/llvm/src/include/llvm/ADT/SmallVector.h:309:11: warning: ‘void* memcpy(void*, const void*, size_t)’ writing to an object of type ‘struct std::pair<void*, long unsigned int>’ with no trivial copy-assignment; use copy-assignment or copy-initialization instead [-Wclass-memaccess]
• /mnt/build/workspace/root-pullrequests-build/root/interpreter/llvm/src/include/llvm/ADT/SmallVector.h:309:11: warning: ‘void* memcpy(void*, const void*, size_t)’ writing to an object of type ‘struct std::pair<void*, long unsigned int>’ with no trivial copy-assignment; use copy-assignment or copy-initialization instead [-Wclass-memaccess]
• /mnt/build/workspace/root-pullrequests-build/root/interpreter/llvm/src/include/llvm/ADT/SmallVector.h:309:11: warning: ‘void* memcpy(void*, const void*, size_t)’ writing to an object of type ‘struct std::pair<void*, long unsigned int>’ with no trivial copy-assignment; use copy-assignment or copy-initialization instead [-Wclass-memaccess]
• /mnt/build/workspace/root-pullrequests-build/root/interpreter/llvm/src/include/llvm/ADT/SmallVector.h:296:13: warning: ‘void* memcpy(void*, const void*, size_t)’ writing to an object of type ‘struct std::pair<clang::CXXRecordDecl*, clang::SourceLocation>’ with no trivial copy-assignment; use copy-assignment or copy-initialization instead [-Wclass-memaccess]

And 68 more

Failing tests:

• projectroot.roottest.root.multicore.roottest_root_multicore_processExecutorH1Test