Change clang libraries to be PRIVATE in target_link_libraries for libHalide to match LLVM ones.
Change clang libraries to be PRIVATE in target_link_libraries for
libHalide to match LLVM ones.


Former-commit-id: 5eb6f678108a3b03047b41fc76d607734e817b1c
darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide