[BOLT][CMake] Add merge-fdata to bolt component

[Amir]

Summary

Build and install merge-fdata tool as part of bolt component:

$ ninja bolt
# builds llvm-bolt, perf2bolt and merge-fdata

$ cmake --install . --component bolt --prefix $HOME/test-install-bolt
-- Install configuration: "Release"
-- Install configuration: "Release"
-- Installing: /home/aaupov/test-install-bolt/lib/libbolt_rt_instr.a
-- Installing: /home/aaupov/test-install-bolt/lib/libbolt_rt_hugify.a
-- Installing: /home/aaupov/test-install-bolt/lib/libbolt_rt_instr_osx.a
-- Installing: /home/aaupov/test-install-bolt/bin/llvm-bolt
-- Installing: /home/aaupov/test-install-bolt/bin/perf2bolt
-- Installing: /home/aaupov/test-install-bolt/bin/llvm-boltdiff
-- Installing: /home/aaupov/test-install-bolt/bin/merge-fdata

Fixes #57249.

[rafauler]

LGTM

bolt/tools/merge-fdata/CMakeLists.txt

 set(LLVM_LINK_COMPONENTS Support)
 
 add_bolt_tool(merge-fdata
   merge-fdata.cpp
 
   DISABLE_LLVM_LINK_LLVM_DYLIB
 
   DEPENDS
   intrinsics_gen
 )
 set_target_properties(merge-fdata PROPERTIES FOLDER "BOLT")
 
+add_dependencies(bolt merge-fdata)
+install(PROGRAMS
+  ${CMAKE_BINARY_DIR}/bin/merge-fdata
+  DESTINATION ${CMAKE_INSTALL_BINDIR}
+  COMPONENT bolt
+  )
+
 # Emit relocations for BOLT meta test (bolt/test/runtime/meta-merge-fdata.test)
 if (BOLT_INCLUDE_TESTS AND UNIX AND NOT APPLE)
   target_link_options(merge-fdata PRIVATE LINKER:--emit-relocs)
 endif()