Do not hide libssp.dll.a (Windows import library) in private library dir (#52820)

Fix #51740 

Since we are providing libssp.dll on Windows and we want to dynamically
link to it, exposing libssp.dll.a is necessary. The inconsistency is
that libjulia-codegen.so looks in build_libdir and build_private_libdir
while standard library precompilation looks in build_shlibdir and
build_private_dir.

Author: mkitti

deps/csl.mk

@@ -111,6 +111,7 @@ install-csl:
 	cp -a $(build_libdir)/gcc/$(BB_TRIPLET)/13/libgcc.a $(build_private_libdir)/
 	cp -a $(build_libdir)/gcc/$(BB_TRIPLET)/13/libmsvcrt.a $(build_private_libdir)/
 	cp -a $(build_libdir)/gcc/$(BB_TRIPLET)/13/libssp.dll.a $(build_private_libdir)/
+	cp -a $(build_libdir)/gcc/$(BB_TRIPLET)/13/libssp.dll.a $(build_libdir)/
 endif
 endif
 ifeq ($(OS),WINNT)
@@ -120,4 +121,5 @@ uninstall-gcc-libraries:
 	-rm -f $(build_private_libdir)/libgcc.a
 	-rm -f $(build_private_libdir)/libmsvcrt.a
 	-rm -f $(build_private_libdir)/libssp.dll.a
+	-rm -f $(build_libdir)/libssp.dll.a
 endif