Revert "Ninja: run cmake-gui for target edit_cache"

This reverts commit e6d2bdfcc2ff54ba482bfdfa028066b8b9a77f78.
Merge topic 'ninja-edit-cache' into next

03ad2a8 Revert "Ninja: run cmake-gui for target edit_cache"
Ninja: run cmake-gui for target edit_cache

Ninja can't run commands interactively,
this will never work with ninja by design,
so start cmake-gui instead.

http://cmake.org/Bug/view.php?id=14544
Merge topic 'ninja-edit-cache' into next

5369a02 Ninja: run cmake-gui for target edit_cache
Ninja: add pool support

With ninja it is possible to control the number of concurrent jobs.

Example:

set_property(GLOBAL PROPERTY POOLS "link=1;compile=1;custom=1")

set(b ${CMAKE_BINARY_DIR})
FILE(WRITE ${b}/foo.cpp "")
FILE(WRITE ${b}/foo2.cpp "")

set_source_files_properties(${b}/foo.cpp PROPERTIES COMPILE_POOL compile)
add_library(lib ${b}/foo.cpp)
set_property(TARGET lib PROPERTY LINK_POOL link)

add_library(lib2 ${b}/foo.cpp ${b}/foo2.cpp)
set_property(TARGET lib2 PROPERTY COMPILE_POOL compile)

add_custom_command(
  OUTPUT ${b}/foo3.cpp
  COMMAND ${CMAKE_COMMAND} -E copy ${b}/foo.cpp ${b}/foo3.cpp
  POOL custom)

add_custom_command(
  OUTPUT ${b}/foo4.cpp
  COMMAND ${CMAKE_COMMAND} -E copy ${b}/foo.cpp ${b}/foo4.cpp
  POOL custom)

add_library(lib3 ${b}/foo3.cpp ${b}/foo4.cpp)
Merge topic 'ninja-experimental-pool-support' into next

a153e72 Ninja: add pool support