[cmake] Fix pre-definintion and dynamic library installation, add options for examples and tests

[JackBoosY]

1. TRITON_BUILDING_DLL is not exists, it should be BUILDING_DLL. See

   Triton/src/libtriton/includes/triton/dllexport.hpp

   Lines 12 to 17 in 96104b1

   	#ifdef BUILDING_DLL
   	#ifdef __GNUC__
   	#define TRITON_EXPORT __attribute__ ((dllexport))
   	#else
   	#define TRITON_EXPORT __declspec(dllexport) // Note: actually gcc seems to also supports this syntax.
   	#endif

2. BUILDING_DLL should only be used in build process, so it must be PRIVATE, not PUBLIC.
3. The dynamic library is not installed.
4. Add options for feature examples and tests.

Related: microsoft/vcpkg#23111

[JackBoosY]

Wow, so quickly.

[JonathanSalwan]

Btw @JackBoosY, regarding microsoft/vcpkg#23111 (comment) what fix are you talking about?

[JackBoosY]

Btw @JackBoosY, regarding microsoft/vcpkg#23111 (comment) what fix are you talking about?

Ah that's only fits for vcpkg, we don't need to fix that here.

[JackBoosY]

And there is another build issue: #1089