Ports: Update ninja's patches to use git patches

Ports/ninja/patches/0002-Disable-load-average-calculation.patch

@@ -0,0 +1,31 @@
+From e73cf241735cdc4f0a51b25baa1ee12b3c418ac5 Mon Sep 17 00:00:00 2001
+From: Nico Weber <thakis@chromium.org>
+Date: Sun, 21 Jun 2020 18:41:01 -0400
+Subject: [PATCH 2/3] Disable load average calculation
+
+---
+ src/util.cc | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/src/util.cc b/src/util.cc
+index c76f730..5ec2bb8 100644
+--- a/src/util.cc
++++ b/src/util.cc
+@@ -588,11 +588,14 @@ double GetLoadAverage() {
+ #else
+ double GetLoadAverage() {
+   double loadavg[3] = { 0.0f, 0.0f, 0.0f };
++  /*
++   * FIXME: serenity way of getting loadavg
+   if (getloadavg(loadavg, 3) < 0) {
+     // Maybe we should return an error here or the availability of
+     // getloadavg(3) should be checked when ninja is configured.
+     return -0.0f;
+   }
++  */
+   return loadavg[0];
+ }
+ #endif // _WIN32
+-- 
+2.36.1
+