Thomas Kohlman

CMake install with namespace and add corresponding alias targets

2

#### Add namespace to installed export `install(EXPORT mimalloc DESTINATION ${mi_install_cmakedir} NAMESPACE mimalloc::)` #### Add alias targets to provide consistent targets for submodule builds. `add_library(mimalloc::mimalloc-obj ALIAS mimalloc-obj)` `add_library(mimalloc::mimalloc-static ALIAS mimalloc-static)`