clean sigar build dependency

Summary:
Clean the sigar build dependency completely under:
- fbcode/fbzmq/public_tld/build/...
- fbcode/openr/public_tld/build/...

Delete files:
- fbcode/opensource/fbcode_builder/manifests/sigar
- fbcode/opensource/fbcode_builder/specs/sigar.py

Reviewed By: steven1327

Differential Revision: D20376067

fbshipit-source-id: 3321a14df2551525acee605028ef06a04cda7c6a

build/fbcode_builder/manifests/sigar

-[manifest]
-name = sigar
-
-[download]
-url = https://github.com/hyperic/sigar/archive/ad47dc3b494e9293d1f087aebb099bdba832de5e.zip
-sha256 = 6604f993ddaf081dbf61e705cbe8d7b91045d8f1226c7ab1aebe6fc20986c3cc
-
-[build]
-builder = cmake
-subdir = sigar-ad47dc3b494e9293d1f087aebb099bdba832de5e
-
-# Override CFLAGS; this is needed because there are a number of functions defined
-# in C files with the `inline` keyword that otherwise get optimized away
-[cmake.defines]
-CMAKE_C_FLAGS = -fgnu89-inline

build/fbcode_builder/specs/sigar.py

-#!/usr/bin/env python
-# Copyright (c) Facebook, Inc. and its affiliates.
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
-
-from shell_quoting import ShellQuoted
-
-
-def fbcode_builder_spec(builder):
-    builder.add_option(
-        'hyperic/sigar:autoconf_options', {'CFLAGS' : '-fgnu89-inline'})
-    return {
-        'steps': [
-            builder.github_project_workdir('hyperic/sigar', '.'),
-            builder.step('Build and install sigar', [
-                builder.run(ShellQuoted('./autogen.sh')),
-                builder.configure('hyperic/sigar'),
-                builder.make_and_install(),
-            ]),
-        ],
-    }