Add version 1.8 of kotlinc to third-party dependencneis

Contents of README.google:
Name: Kotlin
URL: https://github.com/JetBrains/kotlin/
Version: 1.8.0
Revision: NA
License: Apache License Version 2.0

Bug: b/266177488
Change-Id: I7cd353b1cd254530a2b4eb563f818c9886760486
diff --git a/.gitignore b/.gitignore
index 59981e8..d6d767e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -126,6 +126,8 @@
 third_party/kotlin/kotlin-compiler-1.6.0
 third_party/kotlin/kotlin-compiler-1.7.0.tar.gz
 third_party/kotlin/kotlin-compiler-1.7.0
+third_party/kotlin/kotlin-compiler-1.8.0.tar.gz
+third_party/kotlin/kotlin-compiler-1.8.0
 third_party/kotlin/kotlin-compiler-dev.tar.gz
 third_party/kotlin/kotlin-compiler-dev
 third_party/kotlinx-coroutines-1.3.6.tar.gz
diff --git a/build.gradle b/build.gradle
index f5838d6..6429c57 100644
--- a/build.gradle
+++ b/build.gradle
@@ -388,6 +388,7 @@
                 "kotlin/kotlin-compiler-1.5.0",
                 "kotlin/kotlin-compiler-1.6.0",
                 "kotlin/kotlin-compiler-1.7.0",
+                "kotlin/kotlin-compiler-1.8.0",
                 "kotlinx-coroutines-1.3.6",
                 "multidex",
                 "openjdk/openjdk-rt-1.8",
diff --git a/third_party/kotlin/kotlin-compiler-1.8.0.tar.gz.sha1 b/third_party/kotlin/kotlin-compiler-1.8.0.tar.gz.sha1
new file mode 100644
index 0000000..71da776
--- /dev/null
+++ b/third_party/kotlin/kotlin-compiler-1.8.0.tar.gz.sha1
@@ -0,0 +1 @@
+7863f9b7feccc1391176597e1417399b9edc5923
\ No newline at end of file