Fix Windows Unix Makefiles generator builds

Using Unix Makefiles CMake generator on Windows results in a build error. Now fetched hwloc is explicitly built before the library is linked with other UMF targets.

Author: PatKamin

CMakeLists.txt

@@ -284,7 +284,8 @@ else()
 
         message(STATUS "hwloc CMAKE_GENERATOR: ${CMAKE_GENERATOR}")
 
-        if(CMAKE_GENERATOR STREQUAL "Ninja")
+        if(CMAKE_GENERATOR STREQUAL "Ninja" OR CMAKE_GENERATOR STREQUAL
+                                               "Unix Makefiles")
             add_custom_command(
                 COMMAND ${CMAKE_COMMAND}
                         -DCMAKE_INSTALL_PREFIX=${hwloc_targ_BINARY_DIR} -B build