Bug 1286119 - Allow sys_mremap when jemalloc is disabled. r=gcp

MozReview-Commit-ID: FRVorDIIUVR

security/sandbox/linux/SandboxFilter.cpp

@@ -574,8 +574,8 @@ public:
     case __NR_mprotect:
     case __NR_brk:
     case __NR_madvise:
-#if defined(ANDROID) && !defined(MOZ_MEMORY)
-      // Android's libc's realloc uses mremap.
+#if !defined(MOZ_MEMORY)
+      // libc's realloc uses mremap (Bug 1286119).
     case __NR_mremap:
 #endif
       return Allow();