[CMake] use same generator for compiler and stdlib builds

This will  support configurations where ninja is not the search path,
and will avoid problems that can arise from the stdlib build detecting
and using a different generator.

Addresses rdar://142268599

Author: edymtt

CMakeLists.txt

@@ -1611,7 +1611,8 @@ if(SWIFT_ENABLE_NEW_RUNTIME_BUILD)
           -DCMAKE_Swift_COMPILER:FILEPATH=$<IF:$<BOOL:${CMAKE_CROSSCOMPILING}>,${CMAKE_Swift_COMPILER},$<PATH:REPLACE_FILENAME,$<TARGET_FILE:swift-frontend>,swiftc>>
           -DCMAKE_C_COMPILER:FILEPATH=${CMAKE_C_COMPILER}
           -DCMAKE_CXX_COMPILER:FILEPATH=${CMAKE_CXX_COMPILER}
-          -DCMAKE_COLOR_DIAGNOSTICS:BOOLEAN=${CMAKE_COLOR_DIAGNOSTICS})
+          -DCMAKE_COLOR_DIAGNOSTICS:BOOLEAN=${CMAKE_COLOR_DIAGNOSTICS}
+          -DCMAKE_MAKE_PROGRAM=${CMAKE_MAKE_PROGRAM})
       if(NOT ${CMAKE_CROSSCOMPILING})
         add_dependencies("${stdlib_target}" swift-frontend)
       endif()