Limit compiler version target to (major, minor) for capabilities (#1288)

Otherwise, this fails when specifying a compiler version with a patch
version. Specifying a patch version is important for e.g. Jetpack
Compose, where versions are tied explicitly to compiler verions
specifying the patch version. But AFAIK we shoudln't need to
distinguish different capabilities across patch versions.

Author: pswaminathan

src/main/starlark/core/repositories/compiler.bzl

@@ -70,6 +70,8 @@ def _parse_version(basename):
 def _get_capability_template(compiler_version, templates):
     version_index = {}
     target = _version(compiler_version)
+    if len(target) > 2:
+        target = target[0:2]
     for template in templates:
         version = _parse_version(template.basename)
         if not version: