Fix zipalign tests with GetExecutableDirectory

Test: Self-tested
Bug: NA
Change-Id: Idc15c0e028b74a2b38c26af0e7d4a51f32210145
diff --git a/tools/zipalign/Android.bp b/tools/zipalign/Android.bp
index 3eb660d..6805ef7 100644
--- a/tools/zipalign/Android.bp
+++ b/tools/zipalign/Android.bp
@@ -58,6 +58,7 @@
         "tests/src/*_test.cpp",
     ],
     static_libs: [
+        "libbase",
         "libzipalign",
         "libgmock",
     ],