base-filesystem: do not attempt to create a /lib64 -> /usr/lib/<tuple> symlink

In multi-arch distributions (debian and derivatives) multiarch tuples under
/usr/lib are used, such as /usr/lib/x86_64-linux-gnu/ but the /lib64 symlink
should never point there, it should always point to /usr/lib64, as that's
how they are set up by distribution-specific tools.

https://packages.debian.org/bookworm/amd64/libc6-i386/filelist
https://packages.debian.org/bookworm/mipsel/libc6-mips64/filelist
https://salsa.debian.org/md/usrmerge/-/blob/master/convert-usrmerge?ref_type=heads#L295
https://salsa.debian.org/md/usrmerge/-/blob/master/convert-usrmerge?ref_type=heads#L517
http://bugs.debian.org/1076491

Fixes systemd/systemd#33919

(cherry picked from commit b75c137)
(cherry picked from commit 38caeac)
(cherry picked from commit b2738ee)
(cherry picked from commit 3b1f76d)
(cherry picked from commit d62a0aa)

Author: bluca

src/shared/base-filesystem.c

@@ -50,30 +50,25 @@ static const BaseFilesystem table[] = {
         /* aarch64 ELF ABI actually says dynamic loader is in /lib/, but Fedora puts it in /lib64/ anyway and
          * just symlinks /lib/ld-linux-aarch64.so.1 to ../lib64/ld-linux-aarch64.so.1. For this to work
          * correctly, /lib64/ must be symlinked to /usr/lib64/. */
-        { "lib64",    0, "usr/lib/"LIB_ARCH_TUPLE"\0"
-                         "usr/lib64\0",                "ld-linux-aarch64.so.1" },
+        { "lib64",    0, "usr/lib64\0",                "ld-linux-aarch64.so.1" },
 #  define KNOW_LIB64_DIRS 1
 #elif defined(__alpha__)
 #elif defined(__arc__) || defined(__tilegx__)
 #elif defined(__arm__)
         /* No /lib64 on arm. The linker is /lib/ld-linux-armhf.so.3. */
 #  define KNOW_LIB64_DIRS 1
 #elif defined(__i386__) || defined(__x86_64__)
-        { "lib64",    0, "usr/lib/"LIB_ARCH_TUPLE"\0"
-                         "usr/lib64\0",                "ld-linux-x86-64.so.2" },
+        { "lib64",    0, "usr/lib64\0",                "ld-linux-x86-64.so.2" },
 #  define KNOW_LIB64_DIRS 1
 #elif defined(__ia64__)
 #elif defined(__loongarch_lp64)
 #  define KNOW_LIB64_DIRS 1
 #  if defined(__loongarch_double_float)
-        { "lib64",    0, "usr/lib/"LIB_ARCH_TUPLE"\0"
-                         "usr/lib64\0",                "ld-linux-loongarch-lp64d.so.1" },
+        { "lib64",    0, "usr/lib64\0",                "ld-linux-loongarch-lp64d.so.1" },
 #  elif defined(__loongarch_single_float)
-        { "lib64",    0, "usr/lib/"LIB_ARCH_TUPLE"\0"
-                         "usr/lib64\0",                "ld-linux-loongarch-lp64f.so.1" },
+        { "lib64",    0, "usr/lib64\0",                "ld-linux-loongarch-lp64f.so.1" },
 #  elif defined(__loongarch_soft_float)
-        { "lib64",    0, "usr/lib/"LIB_ARCH_TUPLE"\0"
-                         "usr/lib64\0",                "ld-linux-loongarch-lp64s.so.1" },
+        { "lib64",    0, "usr/lib64\0",                "ld-linux-loongarch-lp64s.so.1" },
 #  else
 #    error "Unknown LoongArch ABI"
 #  endif
@@ -89,8 +84,7 @@ static const BaseFilesystem table[] = {
 #  endif
 #elif defined(__powerpc__)
 #  if defined(__PPC64__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
-        { "lib64",    0, "usr/lib/"LIB_ARCH_TUPLE"\0"
-                         "usr/lib64\0",                "ld64.so.2" },
+        { "lib64",    0, "usr/lib64\0",                "ld64.so.2" },
 #    define KNOW_LIB64_DIRS 1
 #  elif defined(__powerpc64__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
         /* powerpc64-linux-gnu */
@@ -101,15 +95,13 @@ static const BaseFilesystem table[] = {
 #  if __riscv_xlen == 32
 #  elif __riscv_xlen == 64
         /* Same situation as for aarch64 */
-        { "lib64",    0, "usr/lib/"LIB_ARCH_TUPLE"\0"
-                         "usr/lib64\0",                "ld-linux-riscv64-lp64d.so.1" },
+        { "lib64",    0, "usr/lib64\0",                "ld-linux-riscv64-lp64d.so.1" },
 #    define KNOW_LIB64_DIRS 1
 #  else
 #    error "Unknown RISC-V ABI"
 #  endif
 #elif defined(__s390x__)
-        { "lib64",    0, "usr/lib/"LIB_ARCH_TUPLE"\0"
-                         "usr/lib64\0",                "ld-lsb-s390x.so.3" },
+        { "lib64",    0, "usr/lib64\0",                "ld-lsb-s390x.so.3" },
 #    define KNOW_LIB64_DIRS 1
 #elif defined(__s390__)
         /* s390-linux-gnu */