gnu: llvm-18: Fix building on i686-linux.

* gnu/packages/llvm.scm (llvm-18)[arguments]: When building for
i686-linux delete the 'make-dynamic-linker-cache phase.

Change-Id: Icbbbccf74ad39d4f8d0270cc213f978c487edb75

gnu/packages/llvm.scm

@@ -1476,7 +1476,15 @@ Library.")
   (package
     (inherit llvm-15)
     (version "18.1.8")
-    (source (llvm-monorepo version))))
+    (source (llvm-monorepo version))
+    (arguments
+     (substitute-keyword-arguments (package-arguments llvm-15)
+       ;; The build daemon goes OOM on i686-linux on this phase.
+       ((#:phases phases #~'%standard-phases)
+        (if (target-x86-32?)
+            #~(modify-phases #$phases
+                (delete 'make-dynamic-linker-cache))
+            phases))))))
 
 (define-public clang-runtime-18
   (clang-runtime-from-llvm llvm-18))