Targets.cmake: fix syntax

[barracuda156]

Also remove a few extra spaces.

[barracuda156]

Existing version fails to configure:

CMake Error at cmake/Targets.cmake:45 (set_target_properties):
  set_target_properties called with incorrect number of arguments.
Call Stack (most recent call first):
  CMakeLists.txt:22 (include)

CMake Error at cmake/Targets.cmake:46 (set_target_properties):
  set_target_properties called with incorrect number of arguments.
Call Stack (most recent call first):
  CMakeLists.txt:22 (include)

CMake Error at cmake/Targets.cmake:55 (set_target_properties):
  set_target_properties called with incorrect number of arguments.
Call Stack (most recent call first):
  CMakeLists.txt:22 (include)

CMake Error at cmake/Targets.cmake:56 (set_target_properties):
  set_target_properties called with incorrect number of arguments.
Call Stack (most recent call first):
  CMakeLists.txt:22 (include)

CMake Error at cmake/Targets.cmake:55 (set_target_properties):
  set_target_properties called with incorrect number of arguments.
Call Stack (most recent call first):
  CMakeLists.txt:22 (include)

CMake Error at cmake/Targets.cmake:56 (set_target_properties):
  set_target_properties called with incorrect number of arguments.
Call Stack (most recent call first):
  CMakeLists.txt:22 (include)

CMake Error at cmake/Targets.cmake:55 (set_target_properties):
  set_target_properties called with incorrect number of arguments.
Call Stack (most recent call first):
  CMakeLists.txt:22 (include)

CMake Error at cmake/Targets.cmake:56 (set_target_properties):
  set_target_properties called with incorrect number of arguments.
Call Stack (most recent call first):
  CMakeLists.txt:22 (include)

-- Configuring incomplete, errors occurred!