[build-script-impl] Add support for building benchmarks on linux but disable it in all currently defined presets for linux.

Author: gottesmm

utils/build-presets.ini

@@ -737,6 +737,25 @@ lit-args=-v
 
 dash-dash
 
+install-foundation
+install-libdispatch
+reconfigure
+skip-build-benchmarks
+
+[preset: buildbot_linux,build_benchmark]
+mixin-preset=mixin_linux_installation
+build-subdir=buildbot_linux
+lldb
+release
+test
+validation-test
+long-test
+foundation
+libdispatch
+lit-args=-v
+
+dash-dash
+
 install-foundation
 install-libdispatch
 reconfigure
@@ -774,6 +793,8 @@ install-foundation
 install-libdispatch
 reconfigure
 skip-test-lldb
+skip-build-benchmarks
+
 
 
 [preset: buildbot_linux_1404_no_lldb]
@@ -835,6 +856,7 @@ dash-dash
 
 build-ninja
 reconfigure
+skip-build-benchmarks
 
 [preset: buildbot_incremental_linux]
 mixin-preset=buildbot_incremental_linux_base

utils/build-script-impl

@@ -1327,6 +1327,8 @@ function calculate_targets_for_host() {
                 swift_sdk="LINUX"
                 build_for_this_target=$(not ${SKIP_BUILD_LINUX})
                 test_this_target=$(not ${SKIP_TEST_LINUX})
+                build_benchmark_this_target=$(not ${SKIP_BUILD_LINUX})
+                test_benchmark_this_target=$(not ${SKIP_BUILD_LINUX})
                 ;;
             freebsd-*)
                 swift_sdk="FREEBSD"