Statically link libminijail to debuggerd_test.

We do not install a 32-bit version of libminijail to 64/32 devices,
which means that "atest -a debuggerd_test" always fails on 32-bit.
Fix it by statically linking libminijail.

Change-Id: I1e5610d1353b4f5b718c1259825421c0c07d7c24

debuggerd/Android.bp

@@ -253,7 +253,6 @@ cc_test {
         "libcutils",
         "libdebuggerd_client",
         "liblog",
-        "libminijail",
         "libnativehelper",
         "libunwindstack",
     ],
@@ -261,6 +260,7 @@ cc_test {
     static_libs: [
         "libdebuggerd",
         "libgmock",
+        "libminijail",
     ],
 
     header_libs: [