Fix linker error with upstream llvm

https://reviews.llvm.org/rGd07ff995917 changed behaviour of lld and is
no longer accepting single dash `-error-limit`. Update to the new flag
format.

Test: presubmit
Change-Id: I7a78128c56157414411d085086091b9d25be0186

Tethering/Android.bp

@@ -134,7 +134,7 @@ cc_library {
         "-Wthread-safety",
     ],
 
-    ldflags: ["-Wl,--exclude-libs=ALL,-error-limit=0"],
+    ldflags: ["-Wl,--exclude-libs=ALL,--error-limit=0"],
 }
 
 // Common defaults for compiling the actual APK.
@@ -231,4 +231,4 @@ genrule {
     cmd: "$(location stats-log-api-gen) --java $(out) --module network_tethering" +
          " --javaPackage com.android.networkstack.tethering.metrics --javaClass TetheringStatsLog",
     out: ["com/android/networkstack/tethering/metrics/TetheringStatsLog.java"],
-}
+}