Add adb to the list of host executables

The adb that ships with Debian is really old

BUG: 113542021
BUG: 113671281
Test: Local build, boot, bin/adb
Change-Id: I90366d81191bcc3b4a42d7df89e6dec75161a423
diff --git a/host_package.mk b/host_package.mk
index 6190276..360e28c 100644
--- a/host_package.mk
+++ b/host_package.mk
@@ -21,6 +21,7 @@
 tests_path := $(notdir $(HOST_OUT_NATIVE_TESTS))
 
 cvd_host_executables := \
+    adb \
     adbshell \
     host_region_e2e_test \
     launch_cvd \