Fix a typo of variable name in install.cpp

Change-Id: I42057bc2fb5096ce009fe6e4b787bc9082cd572f
diff --git a/install.cpp b/install.cpp
index 4afa15c..4a856cd 100644
--- a/install.cpp
+++ b/install.cpp
@@ -184,19 +184,19 @@
     }
 
     // Check for downgrade version.
-    int64_t build_timestampt = property_get_int64(
+    int64_t build_timestamp = property_get_int64(
             "ro.build.date.utc", std::numeric_limits<int64_t>::max());
-    int64_t pkg_post_timespampt = 0;
+    int64_t pkg_post_timestamp = 0;
     // We allow to full update to the same version we are running, in case there
     // is a problem with the current copy of that version.
     if (metadata["post-timestamp"].empty() ||
         !android::base::ParseInt(metadata["post-timestamp"].c_str(),
-                                 &pkg_post_timespampt) ||
-        pkg_post_timespampt < build_timestampt) {
+                                 &pkg_post_timestamp) ||
+        pkg_post_timestamp < build_timestamp) {
         if (metadata["ota-downgrade"] != "yes") {
             LOG(ERROR) << "Update package is older than the current build, expected a build "
-                       "newer than timestamp " << build_timestampt << " but package has "
-                       "timestamp " << pkg_post_timespampt << " and downgrade not allowed.";
+                       "newer than timestamp " << build_timestamp << " but package has "
+                       "timestamp " << pkg_post_timestamp << " and downgrade not allowed.";
             return INSTALL_ERROR;
         }
         if (pkg_pre_build_fingerprint.empty()) {