FS-4657 --resolve update libsndfile to its latest master

libs/libsndfile/src/make-static-lib-hidden-privates.sh

@@ -0,0 +1,14 @@
+#!/bin/bash -e
+
+# This script takes a static library and removes all non-public symbols.
+# Ie, it makes a static lib whose symbols are far less likely to clash with
+# the symbols of another shared or static library.
+
+grep sf_ Symbols.gnu-binutils | sed -e "s/[ ;]//g" > Symbols.static
+
+ld -r --whole-archive .libs/libsndfile.a -o libsndfile_a.o
+
+objcopy --keep-global-symbols=Symbols.static libsndfile_a.o libsndfile.o
+
+rm -f libsndfile.a
+ar cru libsndfile.a libsndfile.o