de-fuzz facter patch

With rpm version < 4.13, patch cmd will create .orig file for fuzzy
patch in default. And this .orig file may lead to rpmbuild failure
"error: Installed (but unpackaged) file(s) found:"

Please visit below link to get more detail info:
https://bugs.launchpad.net/starlingx/+bug/1794611

Story: 2003917
Task: 26966

Change-Id: I7ec6cfad50a4b88de3f8a989fbe04dea14456114
Signed-off-by: slin14 <shuicheng.lin@intel.com>

config/facter/centos/patches/0001-ps.patch

@@ -1,11 +1,8 @@
----
- lib/facter/ps.rb     |    2 +-
- spec/unit/ps_spec.rb |    4 ++--
- 2 files changed, 3 insertions(+), 3 deletions(-)
-
+diff --git a/lib/facter/ps.rb b/lib/facter/ps.rb
+index 9163519..02117ac 100644
 --- a/lib/facter/ps.rb
 +++ b/lib/facter/ps.rb
-@@ -11,7 +11,7 @@
+@@ -12,7 +12,7 @@
  #
  
  Facter.add(:ps) do
@@ -14,6 +11,8 @@
  end
  
  Facter.add(:ps) do
+diff --git a/spec/unit/ps_spec.rb b/spec/unit/ps_spec.rb
+index 2e25a4b..20c61af 100755
 --- a/spec/unit/ps_spec.rb
 +++ b/spec/unit/ps_spec.rb
 @@ -27,9 +27,9 @@ describe "ps facts" do