Always include Unicode charinfo, so tar made in csc mode works in mcs mode (#19813)

As-is, a tarball created in Roslyn mode is missing the file charinfo.nlp, which mcs needs to build the classlib.

Backport of #19807.

Author: monojenkins

mcs/class/corlib/Makefile

@@ -6,7 +6,7 @@ export __SECURITY_BOOTSTRAP_DB=$(topdir)/class/corlib
 LIBRARY = corlib.dll
 LIBRARY_NAME = mscorlib.dll
 
-LIB_MCS_FLAGS = $(REFERENCE_SOURCES_FLAGS) $(RESOURCE_FILES:%=-resource:%)
+LIB_MCS_FLAGS = $(REFERENCE_SOURCES_FLAGS) $(RESOURCE_FILES:%=-resource:%) $(UNICODECHARINFO:%=-resource:%)
 
 USE_XTEST_REMOTE_EXECUTOR = YES
 LIBRARY_WARN_AS_ERROR = yes
@@ -95,7 +95,6 @@ else
 endif
 
 RESOURCE_FILES = \
-	$(UNICODECHARINFO) \
 	$(MANAGED_COLLATOR_RESOURCES_FILES) \
 	LinkerDescriptor/mscorlib.xml
 
@@ -207,6 +206,7 @@ EXTRA_DISTFILES = \
 	$(RESOURCE_FILES) \
 	$(TEST_RESOURCE_FILES) \
 	$(TEST_RESOURCES:.resources=.resx) \
+	resources/charinfo.nlp \
 	LinkerDescriptor/mscorlib_test.xml
 
 TEST_RESOURCE_FILES = \