Added some error logs to wipe

Changed so if we call wipe on a partition that doesn't exist we'll get
some helpful error messages.

Test: tested wipe test
Bug: 194686221
Change-Id: I19dc0396a7a98d0b2be7859edbffeb8acdc9850a
diff --git a/fastboot/task.cpp b/fastboot/task.cpp
index 9268b29..9d4cb75 100644
--- a/fastboot/task.cpp
+++ b/fastboot/task.cpp
@@ -201,9 +201,13 @@
 void WipeTask::Run() {
     std::string partition_type;
     if (fp_->fb->GetVar("partition-type:" + pname_, &partition_type) != fastboot::SUCCESS) {
+        LOG(ERROR) << "wipe task partition not found: " << pname_;
         return;
     }
     if (partition_type.empty()) return;
-    fp_->fb->Erase(pname_);
+    if (fp_->fb->Erase(pname_) != fastboot::SUCCESS) {
+        LOG(ERROR) << "wipe task erase failed with partition: " << pname_;
+        return;
+    }
     fb_perform_format(pname_, 1, partition_type, "", fp_->fs_options);
 }