Utilities/Release: Refactor bootstrap argument construction

Pass needed bootstrap arguments directly instead of constructing them
from various conditions.

Utilities/Release/dash2win64_cygwin.cmake

 set(CMAKE_RELEASE_DIRECTORY "c:/cygwin/home/dashboard/CMakeReleaseCygwin")
 set(PROCESSORS 9)
+set(BOOTSTRAP_ARGS "")
 set(MAKE_PROGRAM "make")
 set(MAKE "${MAKE_PROGRAM} -j8")
 set(HOST dash2win64)

Utilities/Release/dashmacmini2_release.cmake

 set(PROCESSORS 2)
 set(CMAKE_RELEASE_DIRECTORY /Users/kitware/CMakeReleaseDirectory)
 set(USER_OVERRIDE "set(CMAKE_CXX_LINK_EXECUTABLE \\\"gcc  <FLAGS> <CMAKE_CXX_LINK_FLAGS> <LINK_FLAGS> <OBJECTS>  -o <TARGET> <LINK_LIBRARIES>  -shared-libgcc -lstdc++-static\\\")")
-set(INSTALL_PREFIX /)
+set(BOOTSTRAP_ARGS "--prefix=/")
 set(HOST dashmacmini2)
 set(MAKE_PROGRAM "make")
 set(MAKE "${MAKE_PROGRAM} -j2")

Utilities/Release/dashmacmini5_release.cmake

 set(PROCESSORS 4)
 set(CMAKE_RELEASE_DIRECTORY /Users/kitware/CMakeReleaseDirectory)
 # set(USER_OVERRIDE "set(CMAKE_CXX_LINK_EXECUTABLE \\\"gcc  <FLAGS> <CMAKE_CXX_LINK_FLAGS> <LINK_FLAGS> <OBJECTS>  -o <TARGET> <LINK_LIBRARIES>  -shared-libgcc -lstdc++-static\\\")")
-set(INSTALL_PREFIX /)
+set(BOOTSTRAP_ARGS "--prefix=/")
 set(HOST dashmacmini5)
 set(MAKE_PROGRAM "make")
 set(MAKE "${MAKE_PROGRAM} -j5")

Utilities/Release/linux64_release.cmake

 set(PROCESSORS 4)
+set(BOOTSTRAP_ARGS "")
 set(HOST linux64)
 set(MAKE_PROGRAM "make")
 set(CC /opt/gcc-4.9.2/bin/gcc)

Utilities/Release/magrathea_release.cmake

 set(PROCESSORS 1)
+set(BOOTSTRAP_ARGS "")
 set(HOST magrathea)
 set(MAKE_PROGRAM "make")
 set(CC gcc332s)

Utilities/Release/release_cmake.sh.in

@@ -116,15 +116,9 @@ if [ ! -z "@CONFIGURE_WITH_CMAKE@" ]; then
     @CMAKE_CONFIGURE_PATH@ ../@CMAKE_CREATE_VERSION@
     check_exit_value $? "Configure cmake" || exit 1
 else
-    if [ -z "@INSTALL_PREFIX@" ]; then
-	echo  "Run cmake bootstrap --parallel=@PROCESSORS@"
-	../@CMAKE_CREATE_VERSION@/bootstrap --parallel=@PROCESSORS@
-	check_exit_value $? "Bootstrap cmake" || exit 1
-    else
-	echo  "Run cmake bootstrap --prefix=@INSTALL_PREFIX@ --parallel=@PROCESSORS@"
-	../@CMAKE_CREATE_VERSION@/bootstrap --prefix=@INSTALL_PREFIX@ --parallel=@PROCESSORS@
-	check_exit_value $? "Bootstrap cmake" || exit 1
-    fi
+    echo  "Run cmake bootstrap @BOOTSTRAP_ARGS@ --parallel=@PROCESSORS@"
+    ../@CMAKE_CREATE_VERSION@/bootstrap @BOOTSTRAP_ARGS@ --parallel=@PROCESSORS@
+    check_exit_value $? "Bootstrap cmake" || exit 1
 fi
 
 echo "Build cmake with @MAKE@"