llvm-build: Add "--write-library-table" option for generating the C++ library
dependency table used by llvm-config.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143628 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/llvm-build/llvmbuild/componentinfo.py b/utils/llvm-build/llvmbuild/componentinfo.py
index 3ea8001..fb45571 100644
--- a/utils/llvm-build/llvmbuild/componentinfo.py
+++ b/utils/llvm-build/llvmbuild/componentinfo.py
@@ -135,6 +135,12 @@
                 self.add_to_library_groups)
         return result.getvalue()
 
+    def get_library_name(self):
+        return self.library_name or self.name
+
+    def get_llvmconfig_component_name(self):
+        return self.get_library_name().lower()
+
 class LibraryGroupComponentInfo(ComponentInfo):
     type_name = 'LibraryGroup'
 
@@ -179,6 +185,9 @@
                 self.add_to_library_groups)
         return result.getvalue()
 
+    def get_llvmconfig_component_name(self):
+        return self.name.lower()
+
 class ToolComponentInfo(ComponentInfo):
     type_name = 'Tool'