utils/build-presets.ini: Second stab at --build-ninja on linux build

machines after fixing the ninja CXX flag on linux.

Author: Doug Coleman

utils/build-presets.ini

@@ -686,6 +686,7 @@ swiftpm
 xctest
 dash-dash
 
+build-ninja
 install-swift
 install-lldb
 install-llbuild
@@ -817,6 +818,7 @@ lit-args=-v
 
 dash-dash
 
+build-ninja
 reconfigure
 
 [preset: buildbot_incremental_linux]
@@ -1457,4 +1459,4 @@ dash-dash
 
 swift-stdlib-build-type=RelWithDebInfo
 swift-stdlib-enable-assertions=true
-build-serialized-stdlib-unittest
+build-serialized-stdlib-unittest