Enable building specific cmake targets (#3759)

Summary: Pull Request resolved: https://github.com/facebookincubator/velox/pull/3759

Reviewed By: chadaustin

Differential Revision: D42551680

fbshipit-source-id: 4e5c5bef2ad2997e04ab8fb8db4ef7fbeda0bcab

build/fbcode_builder/getdeps.py

@@ -622,6 +622,7 @@ class BuildCmd(ProjectCmdBase):
                         loader,
                         final_install_prefix=loader.get_project_install_prefix(m),
                         extra_cmake_defines=extra_cmake_defines,
+                        cmake_target=args.cmake_target if m == manifest else "install",
                         extra_b2_args=extra_b2_args,
                     )
                     builder.build(install_dirs, reconfigure=reconfigure)
@@ -763,6 +764,11 @@ class BuildCmd(ProjectCmdBase):
                 'e.g: \'{"CMAKE_CXX_FLAGS": "--bla"}\''
             ),
         )
+        parser.add_argument(
+            "--cmake-target",
+            help=("Target for cmake build."),
+            default="install",
+        )
         parser.add_argument(
             "--extra-b2-args",
             help=(