Add support for toc optimization in soong

Skip relinking against shared libraries whose interface hasn't changed.

Test: mmma -j frameworks/native/libs/gui
Test: touch frameworks/native/libs/gui/BufferItem.cpp
Test: mmma -j frameworks/native/libs/gui, see nothing relinks past libgui
Bug: 26014946
Change-Id: I4d4b8da6a35c682341ae51869f5c72b51e192053

scripts/strip.sh

@@ -5,6 +5,7 @@
 #  Environment:
 #   CROSS_COMPILE: prefix added to readelf, objcopy tools
 #  Arguments:
+#   -i ${file}: input file (required)
 #   -o ${file}: output file (required)
 #   -d ${file}: deps file (required)
 #   --keep-symbols