Conan: Add a recipe to pack build profiles in a Conan package

We want to distribute the used build profiles as well. For this we
can put the profiles in a separate Conan package that can be
installed easily.

This is a "header only" recipe which merely packs the profiles inside
the Conan package which the consumers can install with "conan install"
command:

  $conan install qtbuildprofiles/6.2.0@qt/everywhere --build=always

Result:

  ./windows-x86_64-mingw
  ./linux-x86_64-gcc
  ./macos-ios-universal-clang
  ./...

Change-Id: I745a089b4e855c006e1a5f2f0995a73abbcebf2f
Reviewed-by: Toni Saario <toni.saario@qt.io>
(cherry picked from commit 806685f6f7)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

conanfile_profiles.py

@@ -0,0 +1,53 @@
+#############################################################################
+##
+## Copyright (C) 2021 The Qt Company Ltd.
+## Contact: https://www.qt.io/licensing/
+##
+## This file is part of the release tools of the Qt Toolkit.
+##
+## $QT_BEGIN_LICENSE:GPL-EXCEPT$
+## Commercial License Usage
+## Licensees holding valid commercial Qt licenses may use this file in
+## accordance with the commercial license agreement provided with the
+## Software or, alternatively, in accordance with the terms contained in
+## a written agreement between you and The Qt Company. For licensing terms
+## and conditions see https://www.qt.io/terms-conditions. For further
+## information use the contact form at https://www.qt.io/contact-us.
+##
+## GNU General Public License Usage
+## Alternatively, this file may be used under the terms of the GNU
+## General Public License version 3 as published by the Free Software
+## Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+## included in the packaging of this file. Please review the following
+## information to ensure the GNU General Public License requirements will
+## be met: https://www.gnu.org/licenses/gpl-3.0.html.
+##
+## $QT_END_LICENSE$
+##
+#############################################################################
+
+from conans import ConanFile
+
+
+class QtBuildProfiles(ConanFile):
+    name = "qtbuildprofiles"
+    license = "LGPL-3.0, GPL-2.0+, Commercial Qt License Agreement"
+    author = "The Qt Company <https://www.qt.io/contact-us>"
+    url = "https://code.qt.io/cgit/qt/qt5.git"
+    description = "Build profiles for Qt binaries."
+    topics = ("qt", "qt6", "profile")
+    # use commit ID as the RREV (recipe revision)
+    revision_mode = "scm"
+    no_copy_source = True
+
+    def export_sources(self):
+        self.copy("*", src="coin/conan/profiles", dst=".")
+
+    def package_id(self):
+        self.info.header_only()
+
+    def package(self):
+        self.copy(pattern="*")
+
+    def deploy(self):
+        self.copy("*")