Mark release builds as betas, not stable. am: 52de48469c am: fd22786a98 am: 879f825331 am: 87f0c5bc0e

Original change: https://android-review.googlesource.com/c/platform/tools/ndkports/+/1905930

Change-Id: I3a0bfc1917d918206807c26038d103ccb15eea2f
diff --git a/build.gradle.kts b/build.gradle.kts
index ab7c923..f217598 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,6 +1,8 @@
 buildscript {
     val snapshotSuffix = if (hasProperty("release")) {
-        ""
+        // We're still tagging releases as betas until we have more thorough
+        // test automation.
+        "-beta-1"
     } else {
         "-SNAPSHOT"
     }