Disable host Clang builds, since no one is using them.

Bug: http://b/69962132
Test: m checkbuild works
Change-Id: Ib136031dd3c04b67d3a492ac8ce54c3ad88994f8
diff --git a/tools/clang-check/Android.bp b/tools/clang-check/Android.bp
index 3f4036f..b860495 100644
--- a/tools/clang-check/Android.bp
+++ b/tools/clang-check/Android.bp
@@ -2,6 +2,7 @@
 // =====================================================
 clang_binary_host {
     name: "clang-check",
+    enabled: false,
     defaults: ["clang-defaults"],
     srcs: ["ClangCheck.cpp"],
 
diff --git a/tools/clang-format/Android.bp b/tools/clang-format/Android.bp
index b09d955..3e2c015 100644
--- a/tools/clang-format/Android.bp
+++ b/tools/clang-format/Android.bp
@@ -2,6 +2,7 @@
 // =====================================================
 clang_binary_host {
     name: "clang-format",
+    enabled: false,
     defaults: ["clang-defaults"],
     srcs: ["ClangFormat.cpp"],
 
diff --git a/tools/driver/Android.bp b/tools/driver/Android.bp
index 48d2c8e..343d198 100644
--- a/tools/driver/Android.bp
+++ b/tools/driver/Android.bp
@@ -2,6 +2,7 @@
 // =====================================================
 clang_binary_host {
     name: "clang",
+    enabled: false,
     defaults: ["clang-defaults"],
     srcs: ["*.cpp"],