cmRulePlaceholderExpander: Extract from cmLocalGenerator

Implement cmLocalGenerator::ExpandRuleVariables in terms of the new
class for source compatibility and to reduce diff noise in this commit.

1 files changed, 1 insertions, 0 deletions

diff --git a/bootstrap b/bootstrap
index fb8b1eb6e3..9936365b3e 100755
--- a/bootstrap
+++ b/bootstrap
@@ -281,6 +281,7 @@ CMAKE_CXX_SOURCES="\
   cmInstallDirectoryGenerator \
   cmLocalCommonGenerator \
   cmLocalGenerator \
+  cmRulePlaceholderExpander \
   cmInstalledFile \
   cmInstallGenerator \
   cmInstallExportGenerator \