std.Target: Rename is_lib{c,cxx}_lib_name() to isLib{C,Cxx}LibName().

lib/std/Build/Module.zig

@@ -492,11 +492,11 @@ pub fn linkSystemLibrary(
     const b = m.owner;
 
     const target = m.requireKnownTarget();
-    if (target.is_libc_lib_name(name)) {
+    if (target.isLibCLibName(name)) {
         m.link_libc = true;
         return;
     }
-    if (target.is_libcpp_lib_name(name)) {
+    if (target.isLibCxxLibName(name)) {
         m.link_libcpp = true;
         return;
     }