Disable lldb build in PR testing (#11340)

* Disable lldb build in PR testing

Author: shahmishal

utils/build-presets.ini

@@ -744,6 +744,9 @@ install-foundation
 install-libdispatch
 reconfigure
 
+# Skip lldb build due to rdar://problem/33715252
+skip-build-lldb
+
 # Linux package with out test
 [preset: buildbot_linux,no_test]
 mixin-preset=buildbot_linux
@@ -797,6 +800,8 @@ install-libdispatch
 reconfigure
 skip-test-lldb
 
+# Skip lldb build due to rdar://problem/33715252
+skip-build-lldb
 
 [preset: buildbot_linux_1404_no_lldb]
 mixin-preset=buildbot_incremental_linux
@@ -1104,6 +1109,9 @@ skip-test-ios-host
 skip-test-tvos-host
 skip-test-watchos-host
 
+# Skip lldb build due to rdar://problem/33715252
+skip-build-lldb
+
 #===------------------------------------------------------------------------===#
 # Test watchOS on OS X builder
 #===------------------------------------------------------------------------===#