genversion-scripts: fix script name in autogenerated comment

Change-Id: I2a304818cfc54d08a08d2e621e4cf74e7ce465dd
Signed-off-by: Greg Hackmann <ghackmann@google.com>
diff --git a/libc/tools/genversion-scripts.py b/libc/tools/genversion-scripts.py
index e15c04e..4f117f6 100755
--- a/libc/tools/genversion-scripts.py
+++ b/libc/tools/genversion-scripts.py
@@ -7,6 +7,7 @@
 import os.path
 import shutil
 import tempfile
+import sys
 
 
 all_arches = ["arm", "arm64", "mips", "mips64", "x86", "x86_64"]
@@ -17,6 +18,8 @@
 libm_script = os.path.join(bionic_libm_root, "libm.map.txt")
 libdl_script = os.path.join(bionic_libdl_root, "libdl.map.txt")
 
+script_name = os.path.basename(sys.argv[0])
+
 # TODO (dimity): generate architecture-specific version scripts as part of build
 
 # temp directory where we store all intermediate files
@@ -26,7 +29,7 @@
 
 bionic_libc_root = os.path.join(os.environ["ANDROID_BUILD_TOP"], "bionic/libc")
 
-warning = "Generated by genversionscripts.py. Do not edit."
+warning = "Generated by %s. Do not edit." % script_name
 
 
 class VersionScriptGenerator(object):