daemon: Fix my own whitespace errors.

This follows up on commit d993ed43b2bae8717437aa27d9d33fd223a6411f and
was entirely predictable.  The noise, sorry for it.

Change-Id: I8ddb8cfe33db3864949f6589cc091616a90ebc5b

nix/libstore/build.cc

@@ -2155,11 +2155,11 @@ void DerivationGoal::runChild()
         int cur = personality(0xffffffff);
         if (cur != -1) personality(cur | ADDR_NO_RANDOMIZE);
 
-	/* Ask the kernel to eagerly kill us & our children if it runs out of
-	   memory, regardless of blame, to preserve ‘real’ user data & state. */
-	try {
-	    writeFile("/proc/self/oom_score_adj", "1000"); // 100%
-	} catch (...) { ignoreException(); }
+        /* Ask the kernel to eagerly kill us & our children if it runs out of
+           memory, regardless of blame, to preserve ‘real’ user data & state. */
+        try {
+            writeFile("/proc/self/oom_score_adj", "1000"); // 100%
+        } catch (...) { ignoreException(); }
 #endif
 
         /* Fill in the environment. */