Implement RPM Recommends for libdrm

What we want for libdrm-amdgpu is for it to be a recommended package.
Either libdrm or libdrm-amdgpu can be used, but we recommend the latter.

Using "SUGGESTS" does not seem like a strong enough requirement, but
CPACK does not support RPM recommends. Although, it does allow
customizing the RPM SPEC file template. By generating a template, which
is done by setting:

-DCPACK_RPM_GENERATE_USER_BINARY_SPECFILE_TEMPLATE=1

This template file can be trivially modified to allow adding a line to
implement CPACK_RPM_PACKAGE_RECOMMENDS.

Fixes 

Signed-off-by: Jeremy Newton <Jeremy.Newton@amd.com>
Change-Id: I34467b1ba878827ced9b8db74977967815732552

runtime/hsa-runtime/CMakeLists.txt

@@ -451,7 +451,8 @@ if (${EL7_DISTRO} STREQUAL "TRUE")
   set ( CPACK_RPM_BINARY_PACKAGE_REQUIRES "libdrm-amdgpu, numactl-libs" )
 else()
   set ( CPACK_RPM_BINARY_PACKAGE_REQUIRES "(libdrm-amdgpu or libdrm or libdrm_amdgpu1), (libnuma1 or numactl-libs)" )
-  set ( CPACK_RPM_BINARY_PACKAGE_SUGGESTS "libdrm-amdgpu" )
+  set ( CPACK_RPM_USER_BINARY_SPECFILE "${CMAKE_CURRENT_SOURCE_DIR}/RPM/hsa-rocr.spec.in" )
+  set ( CPACK_RPM_PACKAGE_RECOMMENDS "libdrm-amdgpu" )
 endif()
 set ( CPACK_RPM_DEV_PACKAGE_REQUIRES "hsa-rocr , hsakmt-roct-devel" )
 if ( ROCM_DEP_ROCMCORE )

runtime/hsa-runtime/RPM/hsa-rocr.spec.in

@@ -0,0 +1,91 @@
+# Restore old style debuginfo creation for rpm >= 4.14.
+%undefine _debugsource_packages
+%undefine _debuginfo_subpackages
+
+# -*- rpm-spec -*-
+BuildRoot:      %_topdir/@CPACK_PACKAGE_FILE_NAME@@CPACK_RPM_PACKAGE_COMPONENT_PART_PATH@
+Summary:        @CPACK_RPM_PACKAGE_SUMMARY@
+Name:           @CPACK_RPM_PACKAGE_NAME@
+Version:        @CPACK_RPM_PACKAGE_VERSION@
+Release:        @CPACK_RPM_PACKAGE_RELEASE@
+License:        @CPACK_RPM_PACKAGE_LICENSE@
+Group:          @CPACK_RPM_PACKAGE_GROUP@
+Vendor:         @CPACK_RPM_PACKAGE_VENDOR@
+
+# Modifications to allow recommends to be used (not implemented in cpack):
+%if "@CPACK_RPM_PACKAGE_RECOMMENDS@" != ""
+Recommends: @CPACK_RPM_PACKAGE_RECOMMENDS@
+%endif
+# End of modifications
+
+@TMP_RPM_URL@
+@TMP_RPM_REQUIRES@
+@TMP_RPM_REQUIRES_PRE@
+@TMP_RPM_REQUIRES_POST@
+@TMP_RPM_REQUIRES_PREUN@
+@TMP_RPM_REQUIRES_POSTUN@
+@TMP_RPM_PROVIDES@
+@TMP_RPM_OBSOLETES@
+@TMP_RPM_CONFLICTS@
+@TMP_RPM_SUGGESTS@
+@TMP_RPM_AUTOPROV@
+@TMP_RPM_AUTOREQ@
+@TMP_RPM_AUTOREQPROV@
+@TMP_RPM_BUILDARCH@
+@TMP_RPM_PREFIXES@
+@TMP_RPM_EPOCH@
+
+@TMP_RPM_DEBUGINFO@
+
+%define _rpmdir %_topdir/RPMS
+%define _srcrpmdir %_topdir/SRPMS
+@FILE_NAME_DEFINE@
+%define _unpackaged_files_terminate_build 0
+@TMP_RPM_SPEC_INSTALL_POST@
+@CPACK_RPM_SPEC_MORE_DEFINE@
+@CPACK_RPM_COMPRESSION_TYPE_TMP@
+
+%description
+@CPACK_RPM_PACKAGE_DESCRIPTION@
+
+# This is a shortcutted spec file generated by CMake RPM generator
+# we skip _install step because CPack does that for us.
+# We do only save CPack installed tree in _prepr
+# and then restore it in build.
+%prep
+mv $RPM_BUILD_ROOT %_topdir/tmpBBroot
+
+%install
+if [ -e $RPM_BUILD_ROOT ];
+then
+  rm -rf $RPM_BUILD_ROOT
+fi
+mv %_topdir/tmpBBroot $RPM_BUILD_ROOT
+
+@TMP_RPM_DEBUGINFO_INSTALL@
+
+%clean
+
+%post
+@RPM_SYMLINK_POSTINSTALL@
+@CPACK_RPM_SPEC_POSTINSTALL@
+
+%postun
+@CPACK_RPM_SPEC_POSTUNINSTALL@
+
+%pre
+@CPACK_RPM_SPEC_PREINSTALL@
+
+%preun
+@CPACK_RPM_SPEC_PREUNINSTALL@
+
+%files
+%defattr(@TMP_DEFAULT_FILE_PERMISSIONS@,@TMP_DEFAULT_USER@,@TMP_DEFAULT_GROUP@,@TMP_DEFAULT_DIR_PERMISSIONS@)
+@CPACK_RPM_INSTALL_FILES@
+@CPACK_RPM_ABSOLUTE_INSTALL_FILES@
+@CPACK_RPM_USER_INSTALL_FILES@
+
+%changelog
+@CPACK_RPM_SPEC_CHANGELOG@
+
+@TMP_OTHER_COMPONENTS@