versioner: Build SymbolDatabase from version scripts
This commit adds a version script parser so that versioner can build
SymbolDatabase from version scripts.
Bug: 113263746
Test: ./bionic/tools/versioner/run_tests.py
Change-Id: Iedcfe36b51a62693668e07b86aa13592096262db
diff --git a/tools/versioner/platforms/crtbegin.map.txt b/tools/versioner/platforms/crtbegin.map.txt
new file mode 100644
index 0000000..2c08da6
--- /dev/null
+++ b/tools/versioner/platforms/crtbegin.map.txt
@@ -0,0 +1,7 @@
+# This file lists the libc functions are included in `crtbegin.o` and not
+# exported by `libc.so`.
+
+CRTBEGIN {
+ global:
+ atexit; # arm64 x86 x86_64 mips mips64
+};