[CMAKE]

[CMAKE]
* Move cmake files to the cmake folder.
* Rename msc.cmake to msvc.cmake and toolchain-mingw32.cmake to toolchain-gcc.cmake.
* Add compilerflags.cmake to group macros that handle different compiler flags.
* Move add_linkerflag and set_unicode macros to compilerflags.cmake. They were duplicated in gcc.cmake and msvc.cmake.
* Add add_compiler_flags macro to handle CMAKE_C_FLAGS and CMAKE_CXX_FLAGS properly, and replace add_definitions calls with add_compiler_flags calls when we're adding compiler flags, not definitions.
* Reorganize gcc.cmake to have compiler flags then linking and compiling rules.
* Move CMAKE_ASM_COMPILE_OBJECT out of toolchain-gcc.cmake into gcc.cmake and add ${CMAKE_C_FLAGS} to it, now that flags are properly set.
* Don't pass <FLAGS> (compiler flags) when linking.
* Without the (commented out) linker script flag, CMAKE_SHARED_LINKER_FLAGS_INIT is the same for both i386 and amd64. Deduplicate it.
* Fix CMAKE_C_STANDARD_LIBRARIES comment.
* Use <FLAGS> in msvc CMAKE_ASM_COMPILE_OBJECT instead of manual includes.
* Don't set ntdllsys linker language to C, it's an asm lib.
* Remove ros_cd.cmake as it's not needed anymore.
* Define _CRT_SECURE_NO_WARNINGS when compiling host tools with msvc.

svn path=/trunk/; revision=52210